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Mathematics Questions and Answers February 26, 2023

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Part A In Part A, you really getting to know a set of data and allows you the opportunity to perform statistical tests and then interpret the output. You will rely on all you have learned to this point and add correlation and regression strategies to your tool kit. Using the data set: Chamorro-Premuzic.sav; you will focus on the variables related

Tutorial 2 1. Write the t-distribution for p = 2 without using matrix. 2. For SP500 index of 2014 (symbol gspc), please (a) t a t-distribution to the daily log-return. (b) calculate sample Skewness and test the symmetry with signicant level 0.01 (c) calculate sample Kurtosis and test whether it is 3 with signicance level 0.01 (d) t t-distribution

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By Day 3 Post, present, and report a descriptive analysis for your variables, specifically noting the following: For your quantitative variable: Report the mean, median, and mode. Report the standard deviation. What would you say would be the better measure for central tendency? (i.e., mean, median, or mode) and why? How variable are the data? How

03-3 Using previously learned techniques load the data for Exercise 1.5 (page 16) into the CrunchIt spreadsheet environment. Click the \"Graphics\" tab and select \"Histogram\". In the \"Sample\" box select \"Rate\" Specify the histogram drawing parameters as follows: Set \"Bin Width\" to 10 and \"Start Bins At\" to 10. Leave \"Number of Bins\"

You are going to test claim that less than 60% of women do the income taxes for their household. In a random sample of 600 women, 345 of them do the income taxes for their household. Calculate the test statistics. If you use a significance level of 0.10, what will the critical number be for your rejection regions? Also what kind of hypothesis test

Twenty-two volunteers at a cold research institute caught a cold after having been exposed to various cold viruses. A random sample of 10 of these volunteers was given tablets containing 1 gram of Vitamin C four times per day. The control group, consisting of the remaining 12 volunteers, was given placebo tablets that looked the same as the

Shelf_Space_(X)_(Feet) 5 5 5 10 10 10 15 15 15 20 20 20 Weekly_Sales_(Y)_($) 180 180 220 190 210 180 270 220 280 240 280 300

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The 2008 GSS provides the following statistics for the average years of education for lower-, working-, middle-, and upper-class respondents and their associated standard deviations. Mean Standard Deviation N Lower class 11.36 2.96 121 Working class 12.73 2.79 676 Middle class 14.40 3.04 636 Upper class 15.49 2.95 53 What is the probability that a

Question 1 of 20 1.0 Points The alternative hypothesis is also known as the: A.null hypothesis B.elective hypothesis C.research hypothesis D.optional hypothesis Reset Selection Question 2 of 20 1.0 Points A two-tailed test is one where: A.no results lead to the rejection of the null hypothesis B.negative sample means lead to rejection of the null

Many musical composers have used mathematics in their compositions. Some artists have created artworks that use or reflect mathematical principles. Research one such composer or artist, and write an essay discussing the role of mathematics in the composers music or artists art. Make sure you describe the mathematical concepts that are present in

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s 20, 22, 30, and 35 using Excel QM/POM QM NOTE For Problem 30, there is no need to solve the problem using linear programming methods. Instead, you should focus on solving using the project management capabilities within Excel QM/POM QM 20. A series of activities must be completed in a coordinated fashion to complete a landscaping overhaul. The

Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9. Develop a 99% confidence interval for the population mean.(Round your answers to 3 decimal places.) The confidence interval is between and

Use table below to calculate Chi-Square **need equations and calculations** Voting in 1992 election Frequency % Valid % Cumulative % Valid voted 659 73.2 73.6 73.6 did not vote21123.4 23.697.2 not eligible 20 2.2 2.2 99.4 refused5.6.6 100.0 ________________________________________________________________________________ Missing total 895

2.2 (10 points) The following data were generated from a 2 2 factorial experiment with 3 replicates, where factor A levels represent two dierent injection procedures of an anesthetic to the occipital nerve (located in the back of the neck), and factor B levels represent two dierent drugs, which physicians recommend to increase the eectiveness of

In a random sample of 21 people, the mean commute time to work was 34.8 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 98% confidence interval for the population mean mu. What is the margin of error of mu? Interpret the results. The confidence interval for

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Can you show the work how lim as h approaches 0 ((2+h)^2-2^2)/h is equal to 4?

in your OWN words describe the multiple regression modelin statistics. state any references if used.

The following is part of an anova take that was obtained from data regarding 4 treatments and a total of 44 observations source of variation sum of squares degrees of freedom between treatments 110 Error within treatments 195 1. number of degrees of freedom corresponding to between treatment is: 2. the number of degrees of freedom corresponding to

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Question # 1: Regression is one of the most widely used statistical techniques. In business, it is often used within the realm of what is known as predictive analytics estimating the use of statistical techniques to estimate the likelihood or magnitude of future outcomes of interest. However, regression is also an explanatory tool because the

33. Given each of the following functions that maps X = {1, 2, 3} to Y = {A, B, C} f(1) = A, f(2) = B, f(3) = A g(1) = C, g(2) = B, g(3) = A Determine whether the function has an inverse. If it has an inverse, provide it. If it does not, explain why not. 34. Refer to the functions in problem 33. What are domain and codomain of both functions? What

1. Let R be the region bounded by the following curves. Let S be the solid generated when R is revolved about the given axis. Ifpossible, find the volume of S by both thedisk/washer and shell methods. Check that your results agree. y= x-x^10 , y=0 ; revolved about the axis Set up theintegral(s) that gives the volume of the solid as a single

Given the following hypotheses: H 0 : = 100 H 1 : 100 A random sample of six resulted in the following values: 118, 105, 112, 119, 105, and 111. Assume a normal population. a. Using the .05 significance level, determine the decision rule?(Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) RejectH 0 : =

With one method of a procedure called acceptance sampling, a sample of items is randomly selected without replacement and the entire batch is accepted if every item in the sample is okay. A company has just manufactured 1350 CDs, and 651 are defective. If 3 of these CDs are randomly selected for testing, what is the probability that the entire

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Quadrature Amplitude Modulation (QAM) is a signal modulation technique that uses both frequency shift keying and amplitude modulation. QAM16 is a version, where a transmittedsymbol can encode 16 different possibilities (i.e., a single transmitted symbol can be seen tocontain four bits of data). The original alphabet is 8bits long, with values

Suppose there are three states of the world, which are all equally likely, and two dierent nancialassets.In the rst state of the world, the rst asset returns 8% and the second asset returns -6%.In the second state, the rst asset returns -4% and the second asset returns 14%.In the third state,the rst asset returns 11% and the second asset returns

Suppose we have the expected daily returns (in terms of U.S. dollars), standard deviations, and correlations shown in the table below. U.S., German, and Italian Bond Returns U.S. Dollar Daily Returns in Percent U.S. Bonds German Bonds Italian Bonds Expected Return 0.029 0.021 0.073 Standard Deviation 0.409 0.606 0.635 Correlation Matrix U.S. Bonds

I have an assignment based on skittles determining frequency distribution, using excel, and creating a hypothesis test. Please let me know if this is something you can help me with. They're multiple parts.

Supposethatthecurrentexchangerateis 125cfaperghs. Aghanaianinvestorbuysanivorianbondpaying 6%interestfor 1millioncfa,whichthereforecostsghs8000.Thebondwillpay 60000cfainterestperyear;butthe cedi valueofthisdependsonfutureexchange rate,whichfrom todaysperspextivearerandom. A.Supposetheexchangeratenextyearisdistributednormallywith ameanof

Four different paints are advertised as having the same drying time. In order to check the manufacturers' claims, five paint samples were tested for each make of paint. The time in minutes until the paint was dry enough for a second coat to be applied was measured. The following data were obtained. Paint 1 Paint 2 Paint 3 Paint 4 128 144 133 153

Running head: MAT 223 FINAL PROJECT 1 MAT 223 Final Project: Exploring the Class Data Spring 2016 Henry M. Flagler Flagler College MAT 223 FINAL PROJECT 2 MAT 223 Final Project: Exploring the Class Data Spring 2016 In this section, you will need to state the purpose of the study, explain the importance of the research, and what you expected to

A machine has 9 identical components which function independently. The probability that the component will fail is .2. The machine will stop working if more than three components fail. Find the probability that the machine will be working.

A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 B C D Assembling and testing computers Cost per labor hour assembling Cost per labor hour testing $11 $15 Inputs for assembling and testing a computer Basic 5 1 $150 $300 Basic XP 600 Labor hours for assembly Labor hours for testing Cost of component parts Selling price Unit margin

1.) Suppose that X and Y are bivariate normal random variables such that E[X] = 12, V[X] = 5, E[Y] = 1, V[Y] = 9, and = 0.6. Answer the following questions about this distribution: (a) What is P(X 9)? (b) What are E[X | Y = 0] and V[X | Y = 0]? (c) What is P(X > 13 | Y = 0)? (d) What are E[X | Y = 6] and V[X | Y = 6]? (e) What is P(X > 13 | Y = 6)?

An ambulance travels back and forth at a constant speed along a road of length 2L. At a certain moment of time, an accident occurs at a point uniformly distributed on the first half of the road. [That is, the distance of the point from the start of the road is uniformly distributed over (0, L).] Assuming that the ambulances location at the moment

A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer choices a, b, c, d, e and only one correct answer. What is the probability that she answered both of the problems correctly?

The American National Election Studies (ANES) collects data on voter attitudes and intentions as well as demographic information. In this question we will focus on two variables from the 2012 ANES dataset:65 region (levels: Northeast, North Central, South, and West), and whether the respondent feels things in this country are generally going in

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Through experience, Michelle knew that training a new CSA well was essential. Each new CSA was put through a 1-month training program, and was assigned to an existing CSA for an entire month. Normally an existing CSA would work 160 hours per month. However, when a CSA was assigned to perform training of a new-hire, the productive work hours for

Part 3: Cumulative Homework A health psychologist in a northern climate wants to evaluate the claim that UV lamps help lower depressive symptoms in middle-aged women. She recruits volunteers who meet the criteria for clinical depression and assigns them to 2 groups: one group receives a standard treatment for depression and undergoes a half hour

Problem 4.8 Let D = {48, 14, 8, 0, 1, 3, 16, 23, 26, 32, 36}. Determine which of the following propositions are true and which are false. Provide counter examples for those propositions that are false. a. x D, if x is odd then x > 0. b. x D, if x is less than 0 then x is even. c. x D, if x is even then x 0. d. x D, if the ones digit of x is 2,

(Up-and-down Rooks) Consider the game of Up-and-Down Rooks played on a standard chessboard. Player I has a set of white rooks initially located in the bottom row, while player II has a set of black rooks in the top row. In each turn, a player moves one of its rooks up or down a column, without skipping over the other rook or occupying its

Which of the following would be a reason to use a one-sample t-test instead of a one-sample z-test? I. The standard deviation of the population is unknown. II. The null hypothesis involves a continuous variable. III. The sample size is large (greater than 40). (A) I only (B) II only (C) III only (D) I and II (E) I and III

Can the value of the mean, median , or mode of a set of scores ever be negative ? Explain

Utlice Megastat y Excel para corroborar sus respuestas. Ejercicio 1 La cmara de comercio de una comunidad de Florida anuncia que el costo medio de un terreno residencial no pasa de $95,000 por lote. Suponga que en una muestra de 25 lotes se encuentra que la media muestral es $96,500 por lote y que la desviacin estndar muestral es $3,200. a)

PLEASE MAKE THIS AN ADVANCED QUESTION: I have a similar question to my previous one. I already have the information for the following Module Problem Sets: Mod4 (CH8Data.04.sav), Mod5 (CH9BData.sav), and Mod6 (CH11BData.sav). All of these files are in document form. Again, is there any way I can get the .spv files for each of these Modules? The

s 1: Find the domain of f(x) = 2x + 7. Questions 2: What is the domain of g(x) = 1 / (- x + 8). Questions 3: Find the domain of h(x) = (x - 6) / (2x - 8). Questions 4: What is the domain of f(x) = 5 / SQRT(-x + 4)? Questions 5: Find the domain of h(x) = SQRT(-x + 5) / SQRT(x - 3). Questions 6: Find the domain of f(x) = SQRT(|x| - 5). Questions 7:

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What is the difference between systematic random sampling and stratified random sampling.. How do you combine them.. If a question is asked a stratified sample of 10 cities are used...use a systematic sampling technique to find the missing data.

Am i doing this correctly? Lane Chapter 15 Illowsky Chapter 13 Problem #1 Suppose a group is interested in determining whether teenagers obtain their drivers licenses at approximately the same average age across the country. Suppose that the following data are randomly collected from five teenagers in each region of the country. The numbers

A teacher rated the reading ability level of six fourth grade children in a special math program. The reading level ratings were as follows: 3, 3, 2, 8, 4, and 4. a.Compute the mean, variance, and standard deviation (by hand or using SPSS). b.Explain what you have done and what the results mean.

professor polling organization face the challenge of selecting a representative sample of U.S.Adults by telephone. This has been complicated by people who only use cell phones and by others whose landline phones are unlisted. A careful survey by Democracy Corps determined the following proportions: Cell phone only 39% Both cell and landline 29%

Susan wants to buy a house for $200,000. US Bank will give her the loan at 3.5% for 30 years if she puts 20% down and Dacotah Bank will give her the loan at 3.8% for 30 years if she puts 10% down. There are NO other options. a. Which loan should she sign up for? Pick one, no explanation needed. What is her monthly payment? b. After 5 years, Susan

Congressional Terms. Below is given the summary from the 112th Congress of Senators whose terms end in the indicated years. Party 2013 2015 2017 Democrat 21 20 1 Republican 8 15 13 If aSenator is selected at random, find this probability: P(Republican given term expires in 2017) Please put your answer in decimal form, ex..456

$FL2@(#) IBM SPSS STATISTICS MS Windows 24.0.0.0 #########################Y@21 Sep 1621:13:48 ###########################SIBS ####NUMBER OF BROTHERS AND SISTERS ###########X@#####X@########################TVHOURS ####HOURS PER DAY WATCHING TV ###########X@#####X@########################OWNGUN ####HAVE GUN IN HOME##############

Distinguish between description and inference as reasons for using statistics. A. Statistical description provides useful summaries of the data, while inference helps make predictions and decide whether observed patterns are meaningful.B. Statistical inference provides useful summaries of data for a sample, while description provides useful

Chemical Reaction: To determine the effect of pH on a chemical reaction, yeast would be placed in various substrates. As the chemical reaction occurs a gas will be given off. The gas will be captured in a balloon that has been placed over the test tube. We want to know the rate the volume changed. 1. Test tube one pH6: Rate of change in balloon

The average number of miles driven on a full tank of gas in a certain model car before itslow-fuel light comes on is 368. Assume this mileage follows the normal distribution with a standard deviation of 32 miles. c. What is the probability that, before the low-fuel light comes on, the car will travel between 3 3 1 and 3 5 1 miles on the next tank

Biostats SDS 328M Homework 7 Write your answers onto one or more separate sheets of paper. Clearly mark each sheet with your name and your lab section. Show your work and round all answers to at least 3 decimal places. Assume, unless otherwise noted, that =.05 1. As part of a study of environmental influences on sex determination in the fish

The normal distribution is notable for its ubiquity and its usefulness. Psychology data sets, when graphed in a histogram, commonly have a normal shape. post something you find interesting about the normal distribution and state why you find it interesting.

Before the unprecedented decline in home sales that started in late 2008, the National Association of Realtors profile of home buyers and sellers indicated that the percentage of home buyers who are single women has more than doubled since 1981, whereas the percentages of home buyers who are single men has declined. This occurred despite evidence

A random sample of 35 business students required an average of 50.7 minutes to complete a statistics exam. Assume that the population standard deviation to complete the exam was 10.4 minutes. The lower bound of the 95% confidence interval around this sample mean is ___________. A random sample of 35 business students required an average of 50.7

In statistical inference, measurements are made on a [ Select ] ["sample", "population"] , and generalizations are made to a [ Select ] ["sample", "population"]

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UIZ # 7 Problems 1. Determine whether or not the alternating series converge or diverge. (a) ( 1) n 2 n 1 ln( n 1) (b) 2 n 1 n 5n 2 ( 1) n 1 3n 2 2n 1 2. Determine whether the series converges absolutely, or converges conditionally, or diverges and give reasons for your conclusions. (a) ( 1) n 1 n 0 3n 1 (b) n 2 n 1 5 3. Use Ratio Test or Root

What do you observe when you repeat probability sampling procedures many times? a. The sample statistics of quota samples approximate the population parameter more closely than the sample statistics of multistage cluster samples. b. The sample statistics of simple random samples are clustered around the population parameter, but those of

1 A shoe store developed the following estimated regression equation relating sales to inventory investment (x1) and advertising expenditures (x2) . Sales= 25 + 10*x1 + 8x2 Estimate sales resulting from a $15 investment in inventory and an advertising budget of 10$. Select one \" a. b. c. d. e. Predicated sales are $100 You cannot calculate the

It is estimated that 93% of senior citizens suffer from sleep disorders and 8% suffer from anxiety. Moreover, 6% of senior citizens suffer from both sleep disorders and anxiety. (a) Find the probability that a senior citizen suffers from anxiety, given that he or she has sleep disorder. Round your answer to 2 decimal places. b) Given that a senior

Elementary Statistics page 385. # 16 Insomnia Treatment: A clinical trial was conducted to test the effectiveness of the drug zopiclone for treating insomnia in older subjects. Before treatment with zopiclone, 16 subjects had a mean wake time of 102.8 min. After treatment with zoplicone, the 16 subjects had a mean wake time of 98.9 min. and a

On April 15 th , 1912, the R.M.S. Titanic sank into the North Atlantic Ocean, resulting in the loss of more than 1,500 passengers and crew. Below is a table which summarizes the total number of passengers and the number of survivors for the crew, first-, second-, and third-class. Find the proportion of survivors by type of service (crew, first,

A car dealership sells to 3 out of every 10 customers, if 12 customers enters the dealership, Use the binomial probability theory to find the probability that they will sell to: a.1 customer. b.more than two customers

Math 012 Quiz 2 Fall 2015 Professor Rochelle Harley Due Tuesday, November 10, 2015 by 11:59 pm Name________________________________________________________ Instructions: The quiz is worth 70 points. There are 14 problems, each worth 5 points. Your score on the quiz will be converted to a percentage and posted in your assignment folder with

An experimenter flips a coin 100 times and gets 51 heads. Find the 85% confidence interval for the probability of flipping a head with this coin. a)[0.488, 0.493] b)[0.438, 0.382] c)[0.438, 0.582] d)[0.358, 0.582] e)[0.338, 0.532] f)None of the above

The Celtics and the Lakers are set to playa playoff series of n basketball games, where n is odd. The Celtics have a probability p of winning any one game, independent of other games. (a) Find the values of p for which n = 5 is better for the Celtics than n = 3. (b) Generalize part (a) i.e., for any k > 0, find the values for p for which n = 2k +

An educator wants to determine if 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 end of

The ages of MBA students at a university are normally distributed with a known population variance of 10.24. Suppose you are asked to construct a 95% confidence interval for the population mean age if the mean of a sample of 36 students is 26.5 years. If a 99% confidence interval is constructed instead of a 95% confidence interval for the

Design_1 Design_2 Design_3 Design_4 206.23 217.17 226.77 230.57 208.01 221.36 224.83 227.91 206.09 217.96 229.85 231.75 204.41 224.05 228.58 224.89 209.56 211.78 221.35 229.43 203.76 213.84 223.92 231.05 206.67 221.25 223.97 221.55 205.76 229.42 234.27 235.49 204.41 213.52 219.44 228.26 210.81 214.55 233 225.29 Food_Rating Decor_Rating

please show steps A criminologist developed a test to measure recidivism, where low scores indicated a lower probability of repeating the undesirable behavior. The test is normed so that it has a mean of 140 and a standard deviation of 40 Suppose an individual is in the 67 th percentile in this test, what is his or her corresponding recidivism

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Question: 17- 20: In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. They also report that the "margin of sampling error is plus or minus 4%." 17. What is the population of

Movie stars and U.S. presidents have fished Pyramid Lake. It is one of the best places in the lower 48 states to catch trophy cutthroat trout. In this table,x= number of fish caught in a 6-hour period. The percentage data are the percentages of fishermen who caughtxfish in a 6-hour period while fishing from shore. x 0 1 2 3 4 or more % 44% 37% 12%

Again consider the automobile parts supplier situation. Remember that a problem-solving team will be assigned to rectify the process producing the cylindrical engine parts if the null hypothesis H 0 : = 3 is rejected in favor of H a : 3. In this exercise we calculate probabilities of various Type II errors in the context of this situation. Suppose

Astudy was conducted to determine the duration of a typical consultation in an urban medical practice. The results showed that the length of a consultation could be closely approximated by a normal distribution with a mean of 12.2 minutes and a variance of 9.37 minutes 2 . a)Find the probability that a consultation would last more than 10 minutes.

STA2023 Extra Credit #1 1. Here are the summary statistics for the weekly payroll of a small company: Lowest salary = 250, mean salary = 500, median salary = 500, range = 1050, IQR = 300, Q1 = 350, standard deviation = 200. a. In the absence of outliers, do you think the distribution of salaries is symmetric, skewed to the left, or skewed to the

Grading Summary These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date and Time Started: 8/14/2012 11:09:28 PM Time Spent: 37 min , 55 secs Points Received: 8 / 40 (20%) Question Type: # Of Questions: # Correct: Multiple Choice 10 2 Grade

ID Salary Compa Midpoint Age Performance Service Gender Rating Raise Degree Gender 1 Gr Students: Copy the Student Data file data values into this sheet to assist in doing your weekly assignments. The ongoing question that the weekly assignments will focus on is: Are males and fe Note: to simplfy the analysis, we will assume that jobs within each

1. Use problem 6 on page 3-18 to fill in the table and answer the following questions (Using Dmethod). Class Interval Given f X X2 cf Fx method fX fX2 d -2 -1 0 1 2 Total a) Mean b) Median c) Mode d) Range fd d-method d2 fd2 e) Variance g) Quartile 1st f) Standard deviation

WHich of the following best describes the possible values for a chi-square statistic?

Determine whether Absolutely convergent is absolutely convergent, conditionally convergent or divergent. Conditionally convergent Divergent Question 2 of 10 Determine whether is absolutely convergent, conditionally convergent or divergent. Absolutely convergent Conditionally convergent Divergent Question 3 of 10 Determine the radius and interval

2.) Describe the distribution of sample means (shape, expected value and standard error) for samples of n= 36 selected from a population with a mean of = 100 and a standard deviation if = 12. 6.) For a population with a mean of and a standard deviation of , how much error, on average would you expect between the sample mean (M) and the population

Descriptive Statistics Quiz Answer each of the following questions (multiple-choice or short-answer) according to the question prompt. The number that occurs most frequently in a data set is mean median mode harmonic What type of graphic presents data in terms of frequencies per category? Pie chart Line graph Bimodal distribution Histogram When

A certain brand of candies have a mean weight of 0.8616 g and a standard deviation of 0.0515. A sample of these candies came from a package containing 444 candies, and the package label stated that the net weight is 379.0379.0g. (If every package has 444444candies, the mean weight of the candies must exceed 379.0/444 =0.8535 g for the net contents

An urn contains 5yellow balls and 4orange balls. If Juan chooses 5balls at random from the urn, what is theprobabilitythat he will select 2yellow balls and 3orange balls? Round your answer todecimal places. (If necessary, consult alist of formulas.)

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