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Mathematics Questions and Answers February 28, 2023

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A poll is conduct with 1434 randomly selected U.S. adults. The poll showed that 72% of the respondents support gun rights. The sample results are n = 1434 p^ = .072 . Find the confidence Interval that corresponds to a 95% confidence level

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\fThis is an electronic version of the print textbook. Due to electronic rights restrictions, some third party content may be suppressed. Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. The publisher reserves the right to remove content from this title at any time if subsequent

A rock is dropped from the top of a 256-foot cliff. The height, in feet, of the rock above the water after t seconds is modeled by the polynomial 256-16t^2. Factor this expression completely.

What is the expected value for the random variable X shown below? x 100 200 300 400 P(X=x) 0.1 0.2 0.5 0.2 280 290 It cannot be determined from the given information 300 200

A study directed at measuring the fatigue and stress on air traffic controllers has resulted in a recommendation to redesign the controllers' work stations. Three specific althernatives have been selected as having the best potential for reducing controller stress. To test these alternatives, the three types of work stations were installed in a

How does sample size impact the construction of a confidence interval

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If X varies directly as y, and X=6 when y= 3, find X when y=4. Please help! I tried solving several times. This course is based on Angel, survey of mathematics.

Number of Patients Needed in an experimental and a control Group for a Given probability of Obtaining a Significant Result (Two-sided Test) DIFFERENCES IN THE CURE RATES BETWEEN THE TWO TREATMENT GROUPS Lower of the Two Cure Rates .05 .10 .15 .20 .25 .30 .05 .10 .15 .20 .25 .30 .35 .40 420 680 910 1,090 1,250 1,380 1,470 1,530 130 195 250 290 330

PSTAT 175: Practice Final Question Solutions Final Exam: Thursday, December 8 8:00-11:00 Practice Questions 1. A multi-center trial of a new drug protocol decided to perform the analysis stratifying on the clinics. The experimenters measured the time until relapse in a \"drug\" group and in a \"control\" group. The patient care occurred at 6

Many problems in information system design can be solved with the aid of network models and network analysis techniques used in management science. In this lecture, we discuss two popular network models: minimal spanning tree problem and shortest route problem. In each case, we show how a network model is used to provide solutions to computer

help with this please : http://i.imgur.com/Lr4aEoT.png and http://i.imgur.com/52Jwdee.png

The following is a summary of the survival times in days of 72 guinea pigs after they were injected with infectious bacteria in a medical experiment: Which of the following is correct? (a) The median survival time is heavily influenced by the outliers. (b) The standard deviation is not influenced by the outliers. (c) The mean survival time is

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Unit 3, Topic, 13 Exercise 13-17 The proportion who smoke among adult residents of Kentucky in 2004 was 0.276, the highest of any state in the United States. Treat this as the population proportion, and suppose you take a random sample of 400 Kentucky residents. a. Determine the probability of obtaining a sample proportion of Kentucky smokers that

Microsoft Word - HW 1 - ECI 114.docx Before unveiling the new Tesla Model 3, the company wants to reduce the complexity of manufacturing the new model. At the moment, they are thinking of offering among 6 different colors, and 4 different optional item (sunroof, enhance navigation system, spoiler, and an extended battery pack). (a) How many ways

Hello, please answer this question from the answers below For a given set of explanatory variables, in general: The width of a confidence interval cannot be determined. the width of a confidence interval is the same as the width of a prediction interval. a confidence interval is narrower than a prediction interval. a confidence interval is wider

2. An expensive medication from a particular company states 100 ml for the contents on the bottles for this medication. An agency would like to test if the bottles are being under filled, in the sense that the mean contents of all bottles is less than 100 ml. a) State the null hypothesis and the alternative hypothesis. b) The contents in 10

7. The herbal supplement ginko biloba is advertised as producing an increase in physical strength and stamina. To test this claim, a sample of n = 36 adults is obtained and each person is instructed to take the regular daily dose of the herb for a period of 30 days. At the end of the 30-day period, each person is tested on a standard treadmill

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Researchers routinely choose an alpha level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower alpha level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)

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Start this assignment by solving the problem. Explain your choice of method of problem solving. (Use a header titled Method.) Explain the variety of ways to solve the problem. Provide your rationale for selecting the method you adopted Suzie owns a car and moped. She can afford 14 gallons of gasoline to be split between the car and the moped.

I need step-by-step directions. Thank you! Students in the psychology department consume an average of 5 cups of coffee per day with a standard deviation of 1.75 cups. The number of cups of coffee consumed is normally distributed. What proportion of students consume an amount equal to or less than 6 cups a day? How many cups would an individual at

23. An educator wants to determine whether early exposure to school will affect IQ. He enlists the aid of the parents of 12 pairs of preschool-age identical twins who agree to let their twins participate in this experiment. One member of each twin pair is enrolled in preschool for 2 years while the other member of each pair remains at home. At the

Descriptive Statistics - Real Estate Data Part I Descriptive Statistics - Real Estate Data Part 1 Steve Hill, Desiree Delaloza, Steve Muchuca & Rosa Mercado QNT/ 351 - Team A February 29, 2016 Eugene Hewitt Descriptive Statistics - Real Estate Data Part I Team A has created a spreadsheet based on single family homes located in the city of

An explosion causes debris to rise vertically with an initial velocity of 64 feet per second. The polynomial 64x-16x^2 describes the height of the debris above the ground, in feet, after x seconds. A.Findtheheightofthedebrisafter3seconds B.Factor the polynomial

PSTAT W120A, Summer 2016 Assignment 5.A Due Wednesday Aug. 31 Directions: Please write up your solutions and submit them on GauchoSpace by the end of the day on Wednesday. We prefer the submission to be single pdf file if possible. Bonus points will be awarded for organization and neatness. Lesson 17 - Geometric Uniform Random Variables 1. Suppose

Fifteen houses rented recently in a certain county provided the data: size of the housex(in sq. ft.) and the monthly renty(in thousands of dollars). The sample data are summarized by the following information: n = 15, x= 16,560, y= 21.685, xy= 28,474.85, x 2 = 22,557,866, y 2 = 36.93, 650 x 2,400 Which of the following is the least squares

s(t) = 1/3t 2 -2t 2 + 3t+2 t=[0,4] When and where is the particle moving and where and when does it stop When does go left and right When is it speeding up and speeding down?

Name:______________________________________ Module 5 Homework Assignment The paired data below consists of test scores and hours of preparation for 5 randomly selected students. Use this data set to answer the questions below: x Hours of preparation 5 2 9 6 10 y Test score 64 48 72 73 80 1. Use the given data to find the correlation coefficient r,

select 7 numbers from 49 numbers. In order to win a prize one of the numbers must match. Find the probability of winning if a person buys one ticket. (Note: The numbers can be selected in any order and any one of the seven winning numbers on the ticket is a win.) A.0.0167 B.0.14 C.0.0007 D.0.001

A researcher knows that the weights of 6-year-olds are normally distributed with mu=20.9 and sigma=3.2. She suspects that children in poverty-stricken regions are undernourished and therefore underweight. With a sample of n=16 children, the researcher obtains a sample mean of M=18.3. Use a one-tailed test and the .01 of significance to determine

In 36 randomly selected seawater samples the mean sodium chloride concentration was 23 cubic centimeters per cubic meter. Assume the population standard deviation is 6.7 cubic centimeters per cubic meter.

data set is normally distributed with mean 171 and standard deviation 20. If the data set contains 550 data values, approximately how many of the data values will fall within the range 141 to 221? A.421 B.375 C.281 D.510

Order 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 Quantity 86 452 492 191 356 148 342 382 276 118 464 188 25 427 30 111 161 314 442 429 451 32 181 163 336 240 68 317 435 211 76 374 415 408 196 302 312 31 317 394 348 49 500 490 94 Quantity Ordered From To Price per

Write the equation of the line with the slope of 1/4 and the y-intercept of -5

hello, I have a question about the value of patience case study. could someone help me ? thank you very much the question is : "the title of this case study is "the value of patience". Which of these two investors is more patient ? Why ? How is this difference exploited y them in coming to an agreement ?"

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The article continued, No ones sure how Mel Gibson and Mozart help health, but the activities may enhance immunity or coping skills. Comment on the validity of this statement.

Hello, please help me with this Business Calculus problems A fence must be built to enclose a rectangular area of 45,000 ft 2 . Fencing material costs $2 per foot for the two sides facing north and south, and $4 per foot for the other two sides. Find the cost of the least expensive fence

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John listens to a variety of music, including easy listening, classical, and pop/rock. These are the lengths of some of his favorite albums for each of these categories: Easy ListeningClassical Pop/Rock 3967 47 60 7647 40 51 66 56 51 50 4136 78 5561 41 What is the range of the "Classical" data set?

Chapter 2 in your Discovering Statistics Using IBM SPSS Statistics text, respond to the following statement. Identify the problems with null hypothesis significance testing. (Hint: There will be four components.)Describe each problem and address how it impacts the interpretation of the null hypothesis

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Chapter 10 1. Online testing: Do you prefer taking tests on paper or online? A college instructor gave identical tests to two randomly sampled groups of 35 students. One group took the test on paper and the other took it online. Following are the test scores. Page 486 Paper 79 75 49 78 73 81 70 63 79 65 60 74 64 64 74 69 57 65 61 58 92 71 69 66 71

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The following are four observations collected from each of three treatments. Test the hypothesis that the treatment means are equal. Use the .05 significance level. Treatment 1 Treatment 2 Treatment 3 8 3 3 6 2 4 10 4 5 9 3 4 a. State the null and the alternate hypothesis. H0 H1 b. What is the decision rule? (Round your answer to 2 decimal

1. Find a. (f + g)(x), b. (f - g)(x), c. (fg)(x), and d. (f/g)(x). What is the domain of f/g? f(x) = x2 g(x) = 1 - x 2. Find a. f g, b. g f, and, if possible, c. (f g)(0). 1. f(x) = x2 g(x) = x - 1 2. f(x) = 3x + 5 g(x) = 5 - x 3. Determine the domains of a. f, b. g, and c. f g. Use graphing technology to verify your results. 1. f(x) = g(x) = x2

Using SPSS: Take a random sample of 100. Calculate the 95% confidence interval for the variable. Calculate a 90% confidence interval. Take another random sample of 400. Calculate the 95% confidence interval for the variable. Calculate a 90% confidence interval. Post your results and an explanation of how different levels of confidence and sample

You were interested in how long the average psychology major at your college studies per night, so you asked 10 psychology majors to tell you the amount they study. They told you the following times: 2, 1.5, 3, 2, 3.5, 1, 0.5, 3, 2, 4. Find the 95% condence interval on the population mean

a sample that does not accurately represent the population is known as: -a random sample -an exclusive sample -an independent sample -a biased sample

Descriptive Statistics When summarizing interval-ratio variable data using descriptive statistics, what do we lose in our understanding of a sample if we just report the mean and not any measures of dispersion such as the interquartile range or standard deviation? How might this apply to our understanding of a variable such as crime rates in major

The Megabuck Hospital Corp. is to build a state-subsidized nursing home catering to homeless patients as well as high-income patients. State regulations require that every subsidized nursing home must house a minimum of 750 homeless patients and no more than 700 high-income patients in order to qualify for state subsidies. The overall capacity of

Hi! I am trying to do a statistical prediction...The problems is asking me to predict gas mileage from a car that is 142 inches long...I had to make a scatterplot between between the length and gas mileage...the slope ended up being -0.22 and the y intercept is 70.67....I cannot determine how to make a prediction using these???? Please help

Let V = C (1) ([0, 1]), || f || . Find the interior, closure,Isolated points, and boundary of M = {ce x |c R}. Here C (1) ([0, 1] is the space of continuously differentiable functions on [0, 1], and || f || = supx[a,b] | f (x)|. 1 \\documentclass[12pt]{article} \\usepackage[all]{xy} \\begin{document} Interior points: Let $\\epsilon$ >o , then

PSYC 355 SPSS HOMEWORK 1 INSTRUCTIONS: SINGLE-SAMPLE T-TESTS AND PAIRED-SAMPLE T-TESTS When submitting this file, be sure the filename includes your full name, course, and section. Example: HW1_JohnDoe_355B03 Part One: Please note that for all problems in this course, the standard cut-off for a test of significance will be p < .05 unless otherwise

Find the area under the curve for: f(x) = - x + 4 Bound on the left by x=1, on the right by x=4, and by the x-axis. Give an exact answer ( improper fractions, or radicals as needed)

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

Statistics A study is run to estimate the incidence of atrial fibrillation (AF) in men and women over the age of 60. Development of atrial fibrillation was monitored over a 10 year follow-up period. The data are summarized below. Developed AF Did Not Develop AF Men 120 6453 Women 86 7074 Compute the Odds Ratio of AF incidence comparing men and

A Last name: Enter your LETTER answers HERE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 First name: Note: When done, using your LAST NAME and FIRST NAME save THIS file as E270Lastname Firstname TEST7 and e-mail it to stowfig@iupui.edu Questions 1-10 are related to the following data Next 10 questions are based on the following data relating cases sold

Q.13 In a sample of data that has several extremely high scores, creating positive skew, the mean: will be less than the mode. will be greater than the median. and the mode will be equal. will be less than the median.

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A man makes a simple discount note with a face value of 1,200. A term of 160 days , and and 18% discount rate . Find the discount ( use the bankers rule) The discount is $ Round to the nearest dollar as needed

1. QUESTION 1 Express the indicated degree of likelihood as a probability value. "You have one chance in ten of winning the race." 0.5 0.1 0 1 0.9 0 QUESTION 2 1. Find the indicated probability. A bag contains 6 red marbles, 3 blue marbles, and 5 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue?

The experiment is to toss two balls into four boxes in such a way that each ball is equally likely to fall in any of the box. Let X denote the number of balls in the first box. Find the distribution of X , its cumulative distribution function, mean, variance and the median.

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together

Questions: Carefully consider the following questions. Write down your answers (1 - 2 paragraphs) for question # 1 within a word document and submit your answers to your seminar leader. Be prepared to discuss all questions during the seminar section. Do you believe that television viewing is a cause of early smoking initiation? Why or why not?

A sample of 80 juvenile salmon is grouped into the resulting frequency distribution based on their weights. Weight (in grams) Frequency 100-149 15 150-199 10 200-249 30 250-299 25 If a Pie Chart were constructed for the weights of the salmon, what would be the measure of the central angle for the class weighing 200-249 grams?

Prove: if A and B are nxn matrices, thentr(A+B)= tr(A)+tr(B)

This is a discussion question for week 3 for MATH 300 Introduction to Statistics Week 3 Discussion " Data Description " (Please respond to the following.) The table in the e-Activity shows Average Insurance Costs by State. I have attached the table as an Excel file to make it easier to do the calculations required for this discussion question. Be

The following sample was collected for a sample of 200 households to analyze food spending across different regions in Metro and non metro locations. Use this data to respond to respond to the questions given. observatio Annual Food SpeAnnual Household Inco Non mortgage household de Region 1 8909 56697.4462495273 23179.8774302355 NE 2 5684

Find the p-value of the following test. H 0 := 45 H A : 45 = 48,= 15,n= 169,= 0.01

(Fill-In) A frequency distribution that has a tail trailing off to the right of the distribution is ____________ -skewed

Module 6 Statistical Tests Solutions Geremy Gully PSY-845/Dr. Bielek Researchers wanted to explore self-esteem in adolescent boys and adolescent girls. Each respondent completed a 10-item self-esteem scale (they chose one rating for each item from a Likert-type scale, 1 = strongly disagree and 5 = strongly agree). The sum of the 10 ratings was

Describe a test made just for you that would allow you to succeed brilliantly. What have you done in your life that prepares you for that test? Comment on other students' ideal tests.

. In order to determine whether or not a particular medication was effective in curing the common cold, one group of patients was given the medication, while another group received sugar pills. The results of the study are shown Patients Cured 70 20 Patients Not Cured 10 50 We are interested in determining whether or not the medication was

A researcher invented a new drug for baldness and performed a randomized experiment to see if the new drug worked better than the old drug, Rogaine. The new drug performed better in the experiment. The p-value was 0.21.Which of the following statements most accurately describes the implication of that p-value? a. The new drug is significantly

March 27, 2015 Math 303 Assignment 9: Due Wednesday, April 8 at start of class Note: Benjamin Wallace's MLC hours on Thursday April 9 are cancelled and replaced by Tuesday April 7, 12:30-3:30pm. I. Problems to be handed in: 1. Particles are emitted by a radioactive substance according to a Poisson process of rate . Each particle exists for an

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A delivery route must include stops at eight cities. How many different routes are possible? A) 24 B) 4 C) 16 D) 256

1 Fall 2016 PH W250 Homework Problem Set #5 (50 Points) Please type your answers. When doing calculations, please show your work. Numerical answers must contain units when appropriate. When asked to \"interpret\" an answer, this means that you should state in words the meaning of the result referred to. Note that numbers used in problems are not

2/1/2016 Home | Chegg.com BOOKS STUDY MORE home / study / questions and answers / math / statistics and probability / consider the following scenario: we collect daily ... Find books, solutions, tutors and more... Your question has been answered! Rate it below. Post new question Let us know if you got a helpful answer. Expert answers in as little

Trying to findhelp for Sym 506 GCU chapter 10 problems 8 ,13, 51, 52

I need a Scatter diagram done in excel. Can someone help me with this? The number are listed below for the data Market Share Percentage Mean 33.0088 .53832 95% Confidence Interval for Mean Lower Bound 31.9317 Upper Bound 34.0860 5% Trimmed Mean 33.0344 Median 32.6200 Variance 17.387 Std. Deviation 4.16979 Minimum 25.17 Maximum 39.81 Range 14.64

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1. Award: 10.00 points A sample of 35 observations is selected from a normal population. The sample mean is 28, and the population standard deviation is 6. Conduct the following test of hypothesis using the 0.05 significance level. H0 : 26 H1 : > 26 a. Is this a one- or two-tailed test? "Two-tailed"-the alternate hypothesis is different from

Consider the \"separate slopes\" ANCOVA model: Yij=+i+i (xij - i.)+ij, where i=1,....,n. Use the least square method to find and i and i for i=1,.....,a b) Find SSE for the full model c) Use the additional sum of squares F test to construct a test statistic for H0: 1=.......= a What are the appropriate degree of freedom? a)

Suppose F : R 3 R 3 is continuously differentiable, and satisfies that det (DF(x)) 1 for every x B(0, 1), where B(0, 1) is the unit ball in R 3 . Suppose that y R n satisfies |y F(0)| < min |y F(x)|. Show that there exists a point xy B(0, 1) with y = F(xy). |x|=1

In a normal distribution of measurements having a mean of 500 feet and a standard deviation of 50 feet, what percent of the distribution falls between 490 and 520 feet? Select one: a. 63.26 b. 55.65 c. 23.47 d. 24.32

Explain how increasing alpha increases statistical power.

At a large university, an SRS of 25 male faculty members included 10 that felt that the university was supportive of female and minority faculty. An SRS of 20 female faculty found five that felt the university was supportive of female and minority faculty. Letp 1 andp 2 represent the proportion of all male and female faculty, respectively, who

Suppose that the functionssandtare defined for all real numbersxas follows. s(x)=x+3 t(x)=2x+2 Write the expressions for (s-t)(x)= (s+t)(x)= and evaluate (s*t)(4)=

Findzsuch that67%of the standard normal curve lies betweenzandz. (Round your answer to two decimal places.) _____________________________.

1. The test statistics for one-way ANOVA follows the normal distribution. Student 's tdistribution. binomial distribution. F-distribution. 2. Consider this partially completed one-way ANOVA table: How many different populations are being considered in this analysis? 5 8 7 6 3. The following regression output was generated based on a sample of

The standard deviation of test scores on a certain achievement test is 11.1 . A random sample of 80 scores on this test had a mean of 73.7 . Based on this sample, find a 90% confidence interval for the true mean of all scores. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers

100adultswereenrolledinastudyonaging.Atthebaselineexamination,14werefoundtohaveexistingarthritis.Inafollow-upexaminationoneyearlater,sixstatedthattheyhadbeendiagnosedwitharthritissincethebaselineexamination 1. Whatwasthepointprevalenceofarthritisatbaseline 2. What was the one-year period prevalence of arthritis in the previous example 3. What was

John is considering investing in a start-up company that makes smart phone accessories. If next yearsdemand for smart phonesis strong, then this investment plan can realize a net profit of $100,000. If nextyears demand for smart phonesis weak, then this investment plan would result in a $50,000 loss. In theabsence of data, Johns best guess is that

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