1. Assessing NormalityMany times in statistics it is necessary to see if a set of data values is approximately normallydistributed. There are special techniques that can be used. One technique is to draw ahistogram for the data and see if it is approximately bell-shaped. (Note: It does not have tobe exactly symmetric to be bell-shaped.)The numbers of branches of the 50 top libraries are shown.678480779759623733423654181219334924252224299.212124311715211319192222304122182026331414162226101624Source: The World Almanac and Book of Facts.a. Construct a frequency distribution for the data.b. Construct a histogram for the data.c. Describe the shape of the histogram.d. Based on your answer to question 3, do you feel that the distribution is approximatelynormal?

Answered: 1. Assessing Normality Many times in…

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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Data Table Faculty: 2 3 1 0 1 2 4 3 3 2 1 Student: 6 7 9 3 8 11 2 5 7 11 10 b. Give the five-number summary and draw a boxplot for each of the two data sets. Give the five-number summary for faculty parking. low= lower quartile= median= upper quartile= high=
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3. Correlation and linear regression
Find the Pearson's coefficient of skewness of the following set of data. Data 11 13 15 18 22 23 24 26 26 26 32 34 set 36 37 43 44 48 48 49 53 55 55 61 73
Attention: These data are different from your previous questions! Now Lynn takes a different approach. They collect another two samples - GPA from students taking a semester of in-class courses, and then the same students' GPA when they are taking a semester of online courses. The data set is below. They predict that they will find a difference between in-class GPA and online GPA for the same students. Differences Between GPA's Student In Class GPA Online GPA Amy 4.0 3.5 Brad 3.5 2.2 Caroline 3.7 2.0 Dan 3.5 3.5 Emily 3.6 3.3 Frank 3.2 3.2 George 3.3 2.1 What is the t-statistic for this t-test? (Round to 2 decimal places.)
A data set consists of the ages at death for each of the 41 past presidents of United States. Is this set of measurement a population or a sample? _______________________________________________________________________________________ What is the variable being measured? _______________________________________________________________________________________ What measurement scale is appropriate for the data? _________________________________________________
1. Find the value of Q₁ for this data: 2, 4, 6, 8, 10, 12, 14 O A 4 B.5 O c.8 OD. 12
Family Heights. In Exercises 1–5, use the following heights (in.) The data are matched so that each column consists of heights from the same family. Scatterplot Construct a scatterplot of the father/son heights, then interpret it.
A city wants to know if a new advertising campaign to make citizens aware of the dangers of driving after drinking has been effective. The accompanying table shows the number of drivers who have been stopped with more alcohol in their systems than the law allows for each day of the week in the week before and the week a month after the campaign starts. Assume that the data from each population is Normally distributed. Complete parts a through i below. A. Are the data paired? Explain. B. Compute the mean difference C. Compute the standard deviation of the differences. D. Compute the standard error of the mean difference. E. Find the value of the t-statistic. F. How many degrees of freedom does the t-statistic have? G. Is the alternative one- or two-sided? Explain. H. What is the P-value associated with this t-statistic? Assume that the other assumptions and conditions for inference are met.
What do you think the distribution of each of the following data sets will look like? Be sure to discuss shape, center, and spread. Ages of the faculty members at your school. → BIU A - LE3 x²x₂ E 12pt T Paragraph M EE 2

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