O DESCRIPTIVE STATISTICSInterpreting relative frequency histogramsA recent study of 50 U.S. chess players details such things as the number of years the players have been active and the chess ratings of the players. (A chessrating is a number from 100 to about 3000, with a higher number indicating greater expertise.) The chess rating data for the sample of 50 players aresummarized in the following histogram:Relative frequency030.3-0.2802+0.140.120.1+0.080 081900230027001100Chess rating3007001500Based on the histogram, find the proportion of chess ratings in the sample that are less than 1500. Write your answer as a decimal, and do not round youranswer.CheckExplanationUse I Privacy CenterO2021 McGraw Hill LLC. All Rights Reserved. Terms121.94920.jpg263407067 96464.jpgQ

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Answered: O DESCRIPTIVE STATISTICS Interpreting…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A student was interested in the cigarette-smoking habits of college students and collected data from an unbiased random sample of students. The data are summarized in the following table. Males who smoke Males who do not smoke Females who smoke Females who do not smoke What type of chart best represents the relative class frequencies? Multiple Choice Pie chart Box plot Frequency polygon 10 40 15 60 Scatterplot
Answer c and d only. Please explain the results.
South Dakota prices vary $350,000: $400,000:$400,000:$425,000:$429,000: $440,000: $560,000: $585,000,: $585,000: $785,000 : $1,300,000. We found the following Mean = 569000 SD = 272703.1353 T score = .7113 P Value = .4932 CI: 385795.5409,752204.4591 If you had a margin of error of $13,000 how large of sample would you need with a 90% confidence interval using the given tscore.
Make a graphical display of the following data sets, choosing nay type of display that you feel is appropriate. Explain your choice of display and discuss any interesting features in the data. The following table shows the perscentages of American men and women who had never been married in selected years since 1960. Percentages of Adults Who Never Married Year Women Men 1960 19.0% 25.3% 1980 22.5% 29.6% 2000 21.5% 31.3% 2015 28.9% 34.8%
A study was conducted to examine the impact of speaking in public on college students. A class of 15 statistics students participated in the study. At the beginning of a lecture the students recorded their systolic blood pressure. During the lecture the instructor called on each student to stand and answer questions about topics in the lecture. After speaking the students once again recorded their blood pressure. The resulting values are given below along with summary statistics. before 100 123 128 125 136 108 130 113 105 136 146 138 108 149 132 after 141 142 146 136 144 111 132 114 103 133 140 130 100 133 113 difference -41 -19 -18 -11 -8 -3 -2 -1 2 3 6 8 8 16 19 before after difference mean 125.1 127.9 -2.733 st dev 15.26 15.45 15.23 Does this information indicate that blood pressure increased because of speaking? Conduct an appropriate hypothesis test and show appropriate steps. Let μ1 mean systolic blood pressure before speaking in public, and μ2 mean…
Using the following information: identify the population, sample, statistic, and parameter. Political pollsters are often interested in gaining information about the proportion of Americans who will vote for a candidate before the actual election. One group of pollsters conducted a survey of 50,000 people to find out if they planned on voting for Trump in the next presidential election.
What is the degree of freedom (sd) in the analysis of a 4-by-5-dimensional table that is summarized by counting the data? Please select one: a. 12 b. 18 c. 19 d. 15 e. 20
A sample of students involved in laboratory accidents was categorized by age. The results appear as: Find the median score
Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follows. # of movies Frequency Relative Frequency Cumulative Relative Frequency 0 5 1 9 2 6 3 4 4 1 Table 2.67 Construct a histogram of the data. Complete the columns of the chart.
Given the population mean ? = 51 , population ???????? ????????? ? = 4 and a data set below find the z score only for 19 from the list. Data set: 12, 13, 19, 9, 4 Type the answer in hundredths places.
Marc takes a random sample of 14 dogs from the local animal shelter and weighs them. He obtains the following data: 9 25 32 40 41 45 47 50 53 53 62 79 94 106 What is the median for this data?
The increasing annual cost (including tuition, room, board, books and fees) to attend college) to attend college has been widely discussed in many public including Money magazine. The following random samples show the annual cost of attending private and public colleges. Data are in thousands of dollars. Click on the datafile logo to reference the data. Round degrees of freedom to the preceding whole number. DATA file Private Colleges 52.8 30.6 20.3 43.2 Public Colleges 45.8 22.8 22.0 25.8 45.0 33.3 37.8 50.5 28.2 15.6 18.5 44.0 25.6 42.0 a. Compute the sample mean and sample standard deviation for private and public colleges. Round your answers to two decimal places. F1 = 24.1 28.5 21.8 14.4 F2 = S₁ = S₂ b. What is the point estimate of the difference between the two population means? Round your answer to one decimal place. Interpret this value in terms of the annual cost of attending private and public colleges. $ c. Develop a 95% confidence interval of the difference between the…

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