Happy customers As the Hispanic populationin the United States has grown, businesses havetried to understand what Hispanics like. One studyinterviewed a random sample of customers leaving abank. Customers were classified as Hispanic if theypreferred to be interviewed in Spanish or as Angloif they preferred English. Each customer rated theimportance of several aspects of bank service on a10-point scale.³¹ Here are summary results for theimportance of "reliability" (the accuracy of accountrecords and so on):GroupAngloHispanicn9286X6.375.91Sx0.600.93The distribution of reliability ratings in each groupis not Normal. The use of two-sample t procedures isstill justified. Why?Construct and interpret a 95% confidence intervalfor the difference between the mean ratings of theimportance of reliability for Anglo and Hispanicbank customers.Interpret the 95% confidence level in the context ofthis study.

n1=92 n2=86 X1bar=6.37 X2bar=5.91 s1=0.6 s2=0.93

Answered: Happy customers As the Hispanic…

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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To investigate whether one-pound bags of potato chips actually contain a full pound of chips, a skeptical statistics student goes to the supermarket and weighs every bag on the shelf. To analyze these data, what statistical test should i use?
As the Hispanic population in the United States has grown,businesses have tried to understand what Hispanics like. One study interviewed a random sample of customers leaving a bank. Customers were classified as Hispanic if they preferred to be interviewed in Spanish or as Anglo if they preferred English. Each customer rated the importance of several aspects of bank service on a 10-point scale.31 Here are summary results for the importance of “reliability” (the accuracy of account records and so on): Construct and interpret a 95% confidence interval for the difference between the mean ratings of the importance of reliability for Anglo and Hispanic bank customers.
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When a sample contains 100 or more cases, what is the correct probability distribution to use?
A new statistics book has been written and a faculty member and a student are asked to rank the new book and the other five best statistics books. How much do the student and professor agree on their assessment of the books (1 being the favorite, 6 being the least)? Use the data below to answer the following question:
In a recent survey, a group of people were asked if they were happy or unhappy with the state of the country. The data are shown in the contingency table below, organized by political party. What is the relative risk of being unhappy with the state of the country for Democrats? Round your answer to two decimal places. Нарру | Unhappy | Total Republican 152 98 250 Democrat 104 146 250 Total 256 244 500 Provide your answer below:
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An industrial-organizational psychologist is interested in discovering the relationship between the tempo of preferred music that is played in a workplace and employee mood. Employees chose their favorite song on an MP3 player and then reported their moods when listening to that piece of music. A total of 10 participants were asked individually and brought in their own MP3 players; the least number of songs on an employee's MP3 player was 350. The sample data are presented as a scatterplot below. The psychologist wants to use a Pearson correlation coefficient to analyze the relationship. Considering the assumptions for this statistic, which of these statements is the correct course of action? A. The researcher has chosen the wrong statistic to represent this relationship. B. The researcher has violated a robust assumption and should be able to calculate r. C. The researcher has chosen the right statistic because all the assumptions are valid. D. The researcher has violated a…

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