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Mathematics Questions and Answers June 05, 2022

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ing building project, the college president wishes to obtain a simple rando college employs 85 full-time faculty members. To gain the faculty's opinions about an upcom ~ A community | faculty from 1 to 85. Complete parts (a) and (b) below. m Click the icon to view the random number table. = m sample that will consist of 8 faculty members. He
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The histogram shows data collected about the number of passengers using city bus transportation at a specific time of day. A histogram titled City Bus Transportation. The x-axis is labeled Number Of Passengers and has intervals of 1 to 10, 11 to 20, 21 to 30, 31 to 40, and 42 to 50. The y-axis is labeled Frequency and starts at 0 with tick marks

A spinner is divided into four equal areas and colored red, green, yellow, and blue. Which statement is most likely to be true? a.) The probability of the spinner landing on the green region is close to 0.25 when the number of trials is less than 250. b.) The probability of the spinner landing on the green region is close to 0.25 when the number

An ordinary (fair) die is a cube with the numbers 1 through 6 on the sides (represented by painted spots). Imagine that such a die is rolled twice in succession and that the face values of the two rolls are added together. This sum is recorded as the outcome of a single trial of a random experiment. Compute the probability of each of the following

Using the joint probability table below, determine E ( XY ) . \f
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true or false? When running a multiple regression model you should always include all available variables in the dataset.

Could someone please help me with this practice problem? Thanks Explain why a multiplicative inverse mod 7 of 13 does or does not exist. If one does exist, give a value for it and use appropriate calculations to show that it is a multiplicative inverse of 13 mod 7.

A research report presents the results of an independent-measures ANOVA as follows: F (3, 28) = 5.36, p < .01. The research study used a total of 31 participants. True/False

stat question 90 pieces of paper are colored in Red, Blue or Green, where each coloring of the pieces has an equal probability. (a) What is the sample space S of this experiment? (b) What is the probability that an equal number of pieces are painted Red, Blue and Green? (c) Let R; be the event that the i-th piece is colored red. Show that R1, ...,
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In a group of 100 people; 25 were playing cricket and 23 were playing football. Find the probability that a student picked from this group at random is either playing cricket or football? In a group of 100 people; 25 were regular apple eaters and 35 did not like apples. Find the probability that a people picked from this group at random is either

This concept refers to the idea that location/space is a commodity that holds value. When more than one group claims this space, the result is this. Question 49 options: a) Segmented assimilation b) Contested space. c) Topophilia. d) A decrease in population

A retail clothing store chain specializing in suits and accessories for tall men. The proposed height cutoff is 6 ft. 4 in. (76 in.) - the store will stock clothing only for men 6 ft. 4 in. or taller. Information: The average height of adult males in the US is 5 ft. 9 in. (69 in.) with a standard deviation of 3 in.. It is reasonable to assume that

Hi, How many ways can at least two people be selected from a group of 10 people? a) 2 10 - 10 C 0 - 10 C 1 b) 2 10 -1 c) 10 C 2 + 10 C 3 +... + 10 C 10 d) both b and C please explain answer. thank you

stat question A scientist has 15 books: 3 books in each of her 5 favorite topics. She places the books on a shelf uniformly at random. (a) What is the probability that the 3 books in her favorite topic are placed next to each other? Let X be the number of topics whose books are placed next to each other. (b) Prove that the expectation of X is
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Question 1 (4 points) (02.05) The computer output from a set of data and a transformed set of data are below. Regression 1: Coefficients Standard Error t Stat P-value Intercept -249.8892857 138.0250971 -1.8104626690.129994962 Mass 30.25535714 3.828127423 7.903435231 0.000521765 R-sq. = 92.6% R-sq.(adj) = 91.1% Regression 2: Coefficients Standard
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Congress regulates corporate fuel economy and sets an annual gas mileage for cars. A company with a large fleet of cars hopes to meet the goal of 36.5 mpg or better for their fleet of cars. To see if the goal is beingmet, they check the gasoline usage for 42 company trips chosen atrandom, finding a mean of 38.50 mpg and a standard deviation of

Sketch the curve represented by the parametric equations, drawing arrows to indicate the direction of increasing t . x = e t 4and y = e 3 t Eliminate the parameter to determine the Cartesian (rectangular) equation of the curve. ____________, x 4

22 5 points You have data for race/ethnicity (e.g., Black, White, Asian, Latinx) for a sample of 5,000 hospital patients. What kind of descriptive statistics can you provide for this data? O frequencies and percentages z-scores p-values O mean and standard deviation

can someone show this step by step? Problems 8.1-4 (a) Sketch the ensemble of the random process x (1) = arz +b where b is a constant and a is an RV uniformly distributed in the range (-2, 2). (b) Just by observing the ensemble, state whether this is a stationary or a nonstationary process
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Given that z is a standard normal random variable, find z for each situation (to 2 decimals). a. The area to the right of z is 0.02. -2.05 0 b. The area to the right of z is 0.045. -0.13 0 c. The area to the right of z is 0.05. -1.65 0 d. The area to the right of z is 0.40. -0.25 0 Suppose that the mean daily viewing time of television is 8.35
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Given a confidence interval for a true population mean, for a given confidence level, the width of the interval decreases as sample size increases . True or False

Do students participating in extracurricular activities have higher grade point averages? In a large national study, a random sample of 455 students who participated in extracurricular activities had a mean GPA of 2.76 with a standard deviation of 0.68. A random sample of 569 students who did not participate in extracurricular activities had a

A 99% t-based confidence interval for the mean price for a litre of gasoline was calculated using a simple random sample of prices from 50 gas stations. Given that the 99% confidence interval is $1.06 <

7) Five hundred people are enrolled in a 10-year cohort study. At the start of the study, 50 have diagnosed CVD. Over the course of the study, 40 people who were free of CVD at baseline develop CVD. A. What is the cumulative incidence of CVD over 10 years? B. What is the prevalence of CVD at baseline? C. What is the prevalence of CVD at 10 years?

11. The following pertain to the normal distribution and finding z-scores. Find the appropriate z-scores. a. The area to the right of z is 25% b. The area to the left of z is 68% c. The area between -z and z is 90% d. The area to the left of z is 95%
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The school nurse thinks the average height of 7th graders has increased. The average height of a 7th grader five years ago was 145 cm with a standard deviation of 20 cm. She takes a random sample of 200 students and finds that the average height of her sample is 147 cm. Are 7th graders now taller than they were before?

A researcher hears that people who are in romantic relationships that begin online have higher relationship satisfaction than those who began their relationship by meeting in person. She decides to test this. Which is the null hypothesis? H0online relationships > in person relationships H0: online relationships = in person relationships

Monday Tuesday Type of Physical Activity OPEN UP HS MATH | MATH III Ari Avalos NAME 05/ 8/ 24 DATE PERIOD Unit 9, Lesson 1 - Ready, Set, Go Ready 1. Jordan scores a 53 on his math test. The class average is 57 with a standard deviation of 2 points. How many standard deviations below the mean did Jordan score? 2. In Jordan's science class, he
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(a) Let Y= the excess amount of cereal beyond what's advertised in a randomly selected box, measured in grams (1 ounce = 28.35 grams). Find the mean and standard deviation of Y
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Help me find the answer Compute the following values and indicate each on the blank. Use 3 decimal place accuracy. The population values are : 5, 6, and 10 Population Parameters Ex N Median of Population = Range=High-Low= [( x - 1 ) N Standard Deviation: 0= E( x -1) N Proportion of Odds: p = For the row Average, add up all values in each column
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1)A popular television show recently had a 22% market share, which means that 22% were tuned to this show. Assume that an advertiser wants to verify that 22% share value by conducting its own survey with 10 households having TV sets in use at the time of the broadcast. What is the mean number of TV sets tuned into the show? 2)A TV show had a share

Name the type of logical fallacy being used: "Proponents of legalizing marijuana want to give people license to use and sell drugs without consequence." Group of answer choices Appeal to Ignorance Appeal to Authority Straw Man Correlation Implies Causation Post Hoc Appeal to Consequence False Dilemma Circular reasoning Ad Hominem

1) In order to use the expected value/utility model at all, we need to know the value and the probability of every outcome. If we don't know even one of these, there is no way we can make the model do work. a. True b. False 2) Suppose you wonder whether to place a bet of $100 on your favourite team winning tonight. If they do win, you will end up

A p value tells someone reading an article a. how generalizable the results are to the population of interest. b. how likely it is that observed differences between two groups were not due to chance. c. how valid the results of the study are. d. the probability of the intervention working when applied to the population of interest

Really need help with this question! Looking for a detailed explanation that is easy to understand. Thanks! I will give a great review quickly for the correct answer. :) . Provide a proof for of the following questions: (a) Show that the OLS assumption IE(u|X) = 0 implies that: EWI-'J'JQ = 260 + 25133; (b) Show that the regression R2 in the
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A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results: the sample mean is $50.50 and the sample standard deviation is 20. a) Construct a 95%

Two vectors A and B can have any orientation, and IAI> IBI To create a vector with the minimum possible magnitude, the two vectors should be oriented such that... Question 12 options: the vectors point in the same direction. the vectors point in the opposite direction. the vectors are perpendicular to each other

ID island culmen_length_mm culmen_depth_mm flipper_length_mm body_mass_g sex species 39.1 18.7 181 3750 MALE 1 Adelie Torgersen 2 Adelie Torgersen 39.5 17.4 186 3800 FEMALE Torgersen 40.3 18 195 3250 FEMALE 3 Adelie 4 Adelie Torgersen 3450 FEMALE 5 Adelie Torgersen 36.7 19.3 193 Torgersen 39.3 20.6 190 650 MALE 6 Adelie 38.9 17.8 181 3625 FEMALE 7
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The formula for the Richter magnitude, M, of an earthquake is, ( attached in the picture)where A is the amplitude of the earthquake andis the amplitude of a standard earthquake with magnitude of 0. \f
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A psychology researcher investigated the impact of 'positive self-talk' on the athletic performance of college athletes. For the study, a sample of n = 40 athletes were recruited from a state college. Twenty students engaged in positive self-talk for 30 minutes a day for the entire semester; the remaining 20 students did not engage in positive

Construct a data set that has the given statistics. N = '1 = a 00030} What does the value N mean? A. The mean of the population data. B. The range of the population data. C. The dierenoe between all the values in the population data set. s" D. The number of values in the population data set. This means there should be 6 values in the data set.
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\f\f\f\f\fhave b and variable ribes the ationship between the ratio of of the premier P and the rate of change, wih mo pact to bot. of theThe number of people P that are contracting a new disease can be modeled by the population virus P(t) = - 3725 1+1.72e-0.52t where t is measured in days. At approximately what rate is the disease spreading on
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What is/are the population parameter(s) in the hypothesis? What was the researcher's conclusion about the hypothesis? Was there a p-value, a confidence interval, etc. that led you to this conclusion? You won't often find a hypothesis stated like this in research: You'll have to dig around in the introduction and the results to determine what the

What are the sanity checks and observations in INB HOTELS? What are the observations and sanity checks in INN HOTELS 5 import warnings 6 warnings . filterwarnings("ignore") Note: After running the above cell, kindly restart the notebook kernel and run all Data Overview . Observations . Sanity checks TT BIG
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Assume that 3b h = 36 to find the maximum area of the triangle?A farmer has 400 feet of fencing with which to build a rectangular corral having two internal dividers both parallel to two of the sides of the corral. What is the maximum total area of such a corral

S https://www.stitz-zeager.com/szca07042013.pdf#page=30&zoom=auto,-73,642 Plot and label the points A(-3, -7), B(1.3, -2), C(7, V10), D(0, 8), E(-5.5, 0), F(-8, 4) G(9.2, -7.8) and H(7, 5) in the Cartesian Coordinate Plane given below. -9 -8 -7 -6 -5 -4 -3 -2-1 2 3 5 6 8 9 r For each point given in Exercise 20 above
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Tree showing nondiscounted prices for one-period moedl. Interest(r) = 0.11 \f
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Help me with this please -38flushed=false&c Statistics Summer 2020 - SFalbowski Dougie Mysh Homework: Sec 6.3 Score: 0.5 of 1 pt 3 of 10 (3 complete) Statistics 6.3.67 In a certain area, 38% of people own a dog. Complete parts a and b below. a. Find the probability that exactly 8 out of 10 randomly selected people in the area own a dog. The
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The density The density f (a) = e 12 /2 correspond to a 2 TT O Binomial random variable X O geometric random variable O uniform continuous random variable O standard normal random variable O Bernoulli random variable O exponential random variableDetermine whether the value is a discrete random variable, continuous random variable, or not a random
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Determine the type of distribution for the following situation: Draw marbles from a bag which contains 5 red marbles, 6 blue marbles and 4 green marbles with replacement until you get a blue marble. a) Binomial b) Poisson c) Hypergeometric d) None of these

In the past, schools in Los Angeles County have closed an average of 3 days each year for weather emergencies. a) What is the probability that schools in Los Angeles County will close for 4 days next year? b) What is the probability that schools in Los Angeles County will close for more than 2 days next year?

Consider the following hypothesis test. Given that n = 83, = 8, x = 50.5, and = 0.10, complete parts a through d below A - H : 0 47 B- H : A > 47 a. State the decision rule in terms of the critical value(s) of the test statistic. Reject the null hypothesis if the calculated value of the test statistic, (1) _________is (2)________ the critical

What is an alternate name for an independent variable? Group of answer choices control variable criterion variable moderating variable treatment variable

Rhonda has always prided herself on being a good driver, but she has received one speeding ticket. I wonder how her driving record compares to others. If the population mean for number of speeding tickets is 2 and the population standard deviation is .5, what percentage of people have received more speeding tickets than her?

Please explain to me how to get the correct answers to these questions. A survey of 59 customers was taken at a bookstore regarding the types of books purchased. They survey found that 35 customers purchased mysteries 28 purchased science fiction, 21 purchased romance novels, 15 purchased mysteries and science fiction, 11 purchased mysteries and

Similarly, the assumption that the sample is representative of the population carries the risk of sampling bias. If the sample is not truly representative, the study's findings may not be generalizable to the broader population (Battaglia, 2008). For instance, if the sample disproportionately includes individuals from a particular demographic

Understanding decimal place value is indeed intricately linked to a solid grasp of whole number place value. Breaking down large numbers into ones, tens, hundreds, and so forth lays a sturdy foundation. Visual aids and manipulatives, especially when illustrating fractions corresponding to decimal places, enhance comprehension. Decimal numbers,

2. What is wrong with the following statements? Explain your answer. a. The probability that a student misses a class is 0.04 and the probability that he attends the class is 0.9 b. P (A and B) = -0.2 c. P (complement of A) = 0.7 given that P(A) = 0.7

A straight, tapered wing of 10 m span has leading-edge & trailing-edge sweep angles of 45 deg. and 15 deg., respectively. The base of the root chord is aligned horizontally to the tip of the tip chord. Find the mean aerodynamic chord.

How do you use SAS Enterprise Miner to build a regression model

You are collecting the same data and receive very different results from your participants. What do you do? Question 11 options: Reevaluate data-taking methods. Nothing, it is perfectly fine to have different samples. Decide their results don't matter and ignore them. Average your scores with the participate's mean

This is the question : If a person is picked at random from the sample, what is the probability that they are age 25-29 or did not respond to this

Note: Replace the bracketed text on page one (the cover page) with your personal information. 1. Introduction Discuss the statement of the problem in terms of the statistical analyses that are being performed. Be sure to address the following: What is the data set that you are exploring? How will your results be used? What type of analyses will
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Stock screeners are automated tools used by investment companies to help clients select a portfolio of stocks to invest in. The table below lists the annualized percentage return on investment (as compared to the Standard & Poor's 500 Index) for 15 randomly selected stock screeners provided by the American Association of Individual Investors

I need to choose a statistical test for an experiment with the following variables: Two Independent Variables (Both are nominal variables and both have 2 levels); the Dependent Variable is an Ordinal Variable (A pain scale from 1-10). This is a "between-subjects" study. What kind of test statistic test should I use? I was thinking to use

Project 4 : Messages arrive at an electronic mail server according to a Poisson process with the average frequency of 5 messages per minute. The server can process only one message at a time, and messages are processed on a "first come-first serve" basis. It takes an Exponential amount of time U to process any text message, plus an Exponential

Simple regression 1.Eisenhofer et al. (1999) investigated the use of plasma normetanephrine and metanephrine for detecting pheochromocytoma in patients with von Hippel-Lindau disease and multiple endocrine neoplasia type 2. The vonHippelLindau.dta data file contains data from this study on 26 patients with von Hippel-Lindau disease and 9 patients
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With you acting as the gunsmith, what is typically the recommended course of action if the extractor surfaces are worn in a firearm? A.Send the firearm to a gunsmith for reprofiling and tempering of the worn extractor surfaces. B.Clean the extractor surfaces thoroughly, and if necessary, order a new spring for improved tension. C.Replace the worn

15. A study is conducted to compare a mean cholesterol levels for at least 6 months to individuals following a conventional (low fat, low calorie) diet for at least 6 months.The data are summarized I table 7-59.Test if there is a significant difference in mean cholesterol levels between the diet programs using a 5% level ofsignificance. Please
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What type of graph best suits GPA of 500 students? What type of graph best suits blood type of students in a classroom? 1 Date: 11/06/ 2020 American college of Technology Stat173 assignment 4 (Due date 28 /06/2020) 1. A social worker collected the following data on marital status for 25 persons. (M=married, S=single, W=widowed, D=divorced).
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A recycling plant wants to estimate the average time needed for a new machine to process a plastic bottle. A sample of 35 bottles required an average processing time of 3,4 minutes for each bottle. Assuming that the population standard deviation is 0,9 minutes, construct a 95% confidence interval estimate, to one decimal place, for the average

Suppose that the duration of a particular type of criminal trial is known to be normally distributed with a mean of 19 days and a standard deviation of 4 days. Let X be the number of days for a randomly selected trial. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. If one of the trials is

A simple logistic regression analysis will produce: A. An adjusted estimate of the odds ratio associated with an exposure B. A crude estimate of the odds ratio associated with a single exposure C. Examination of effect modification D. Tests for confounding

7. G(x) is the function defined by the following graph. The graph window is: [-3, 5, 1] by [-60, 80, 10]
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For women aged18-24, systolic blood pressures are normally distributed with a mean of 114.8 mm Hg and a standard deviation of 13.1 mm Hg. If 23 women aged18-24 are randomlyselected, find the probability that their mean systolic blood pressure is between 119 and 122 mm Hg. Round to four decimal places.

Why is the interquartile range a more stable measure of variation than the range? Why is the interquartile range a more stable measure of variation than the range? It is based on only two scores. It is represented as a percentage rather than a raw score. It is based on intermediate rather than extreme scores. It is represented as a ratio

Suppose that X U(0,1) is a uniform random variable on the interval (0,1) and let Y = ln(X). Find FY , the distribution function of Y . Determine whether Y has a density function (give reasons for your answer), and, if it exists, nd the density for Y .

Physical stores have limited shelf space. According to the theory of the Long Tail, they must Group of answer choices Offer an increasing variety of content to make sure they have something for everyone Offer smaller items that take up less shelf space Restock their shelves as often as every day Offer a limited range of the most popular content,

Hi. I need help with the following example and how to demonstrate the solution. A college admissions officer for the school's online undergraduate program wants to estimate the mean age of its graduating students.The administrator took a random sample of 40 from which the mean was 24 years and the standard deviation was 1.7 years. If the mean age

1.Produce the mode, median, mean, standard deviation, variance, range, minimum, and maximum for JAILCREDIT and AGEADMIT. Report the results. 2.Construct a 95% confidence interval around the sample mean of JAILCREDIT and AGEADMIT, respectively. Interpret and summarize your results. ageadmit jailcredit Mean 46.68 Mean 1178.86 Standard Error
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Question 3 25 marks You should be able to answer this question after working through Unit B3. i. ii. The MINITAB worksheet LoanApplicant . mtw contains measurements of the 30 loan applicants. You may assume that the income and age of the applicants may be adequately modelled by a normal distribution. Use the data to calculate an exact 95% condence
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15. The population, P, of a bacteria co1. A manufacturing company is responsible for designing a 500 mL can for diced tomatoes. Determine the dimensions of the can that will minimize the surface area of the can. Recall: ? = ??2h and ?? = 2??2 2??hlony at t hours can be modelled by: () = 100 120 102 23 a. What is the initial population of the

Use the data below to answer the scientific question: Corals from/Tank type/# bleached corals inshore reef / normal / 0/15 / offshore reef / normal / 0/15 / inshore reef / heater / 5/15 / offshore reef / heater / 10/15 / (this is a table) 1. What data will you graph to answer the question? a) Identify the Independent variable: b) Identify the

Suppose that a market research firm is hired to estimate the percent of students living on campus. Five hundred randomly selected students are surveyed to determine whether the live on-campus.Of the 500 students sampled, 421 responded yes they live on-campus. Construct a 90% confidence interval for the proportion of all students who live on-campus

According to Investment Digest ("Diversification and the Risk/Reward Relationship", Winter 1994, 1-3), the mean of teh annual return for common stocks from 1926 to 1992 was 16.5% and the standard deviation of the annual return was 19%. In later parts of the we will ask: a. What is the probability that the stock returns are greater than 0%? b. What

Twenty marbles are used to spell a word9 blue ones, 5 red ones, 3 yellow ones and 3 green ones. If two marbles are drawn from the set of twenty marbles at random in succession and without replacement, what is the probability (as a reduced fraction) of choosing a marble other than red each time?

powerpoint how to Insert Alt Text. Select the picture on slide 2 and open the Alt Text pane. Check Mark as decorative. Change the picture transparency to Transparency: 65%. Select the picture on slide 4 (the same picture) and type the following Alt Text: A single-family home with blue side

What is the significance level and the p-value for this one way ANOVA table? Do you reject or accept the null? \f
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Which of the following statements is true? a.Sample size determines sampling error. b.Sample variance and population variance are the same when their sizes are the same. c.Sample mean and population mean are the same when their sizes are the same. d.Population size is always either very large or infinity

4) The company earned and received interest income of $499 during the year. 5) The company collected cash of $30,564 from its customers for sales initially recorded as accounts receivable. 6) Inventory costing $12,862 was purchased on account during the year. 4
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Can you please help me complete these charts? Factor Method of Yield Adjustment Oatmeal Cookies (50, 1.5 oz servings) Recipe Ingredient Unit Amount Pound equivalent measures Factor adjustment Calculate Quantity in pounds for 150 servings Rounded Quanitity in pounds for 150 Servings Baking soda tsp 2 0.02833 Eggs, beaten lb 0.25 0.25 Flour, all

(1 point) Construct the 99% confidence interval estimate of the population proportion p if the sample size is n. = 1000 and the number of successes in the sample is a: = 433.
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Desiccant is being discussed. Technician A says all three manufacturer-approved refrigerants use the same desiccant. Technician B says the desiccant in an accumulator can be replaced without replacing the accumulator. Who is correct

The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium fuel is a normally distributed random variable with a mean of = 24.50 mpg and a standard deviation of = 3.50 mpg. (a) What is the standard error ofX , the mean from a random sample of 9 fill-ups by one driver? (Round your answer to 4 decimal

What is the domain of the inverse function of f(x)=-x^2

4. Consider a random sample X1. ..., Na from a discrete distribution with P(X, - *] - (1 - pjk -"p fork - 8,8 +1,..., where 0
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Note that the limits of the following four functions were estimated on the first exam. Find the exact value of each limit. 1. Let a(x) = (1 - 10x)= and evaluate 3. Let c(x) = (1 + 10r)# and evaluate lim a(r) lim c(x)
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12. Which of the following characteristics of the relationship between X and Y is not measured by a Spearman correlation? a. the direction of the relationship b. the degree of consistency of the relationship c. the exact form of the relationship d. All of the other choices are characteristics measured by the Spearrnan correlation
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QUESTION1 A accounting firm claims that the mean starting salaries for purchasers is $55,000 per year. The mean of a sample of 24 purchasers was found to be $53,000 with a standard deviation of $2,500.At a significant level = 0.05 determine the critical values given the following null and alternative hypotheses. H0: = $55,000 H1: $55,000 Critical

Four histograms are displayed below. These histograms are again labelled 'Histogram A'; 'Histogram 8', 'Histogram C' and 'Histogram D'; respectively. 200- 150' 100- 50' 0. 50' 40' 30' 20' 10- 0. VWEJIWIH WNIWIH Frequency 50' 40' OWIJ'WIH 20- 0. 40' 30' 20' 10' 0_ _ G WIIWHIH -50 0 50 100 Values In random order, the averages of the data displayed
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