10.8 [Data Set: AMDREAM] REACHING THE AMERICAN DREAM. Refer to the Even 2019 survey on reaching the "American Dream," Exercise 3.130. Recall that one of the survey questions asked 1,083 Americans to complete the sentence: "When thinking about the American Dream and my own family, I feel..." Responses were categorized as "My family has achieved it", "It is within reach for me", "Somewhat optimistic I will reach it", “Somewhat pessimistic I will reach it", "It is out of reach for me", and "Not sure". The results (category percentages) are summarized in the Minitab pie chart below. a. Identify the categorical variable (and its levels) measured in this study. b. Convert the percentages shown on the pie chart to raw numbers (i.e., to values that represent the number of respondents in each category). c. If the true percentages in each category are equal, how many of the 1,083 responses would you expect to find in each category. d. Specify the null and alternative hypotheses for testing whether the true percentages in each category are equal. e. Calculate the x² test statistic for testing the hypotheses in part d. f. Give the rejection region for the test using a g. Use the results, parts e and f, to make the appropriate conclusion. h. Find and interpret a 95% confidence interval for the proportion of all Americans who feel their family has achieved the American Dream.
10.8 [Data Set: AMDREAM] REACHING THE AMERICAN DREAM. Refer to the Even 2019 survey on reaching the "American Dream," Exercise 3.130. Recall that one of the survey questions asked 1,083 Americans to complete the sentence: "When thinking about the American Dream and my own family, I feel..." Responses were categorized as "My family has achieved it", "It is within reach for me", "Somewhat optimistic I will reach it", “Somewhat pessimistic I will reach it", "It is out of reach for me", and "Not sure". The results (category percentages) are summarized in the Minitab pie chart below. a. Identify the categorical variable (and its levels) measured in this study. b. Convert the percentages shown on the pie chart to raw numbers (i.e., to values that represent the number of respondents in each category). c. If the true percentages in each category are equal, how many of the 1,083 responses would you expect to find in each category. d. Specify the null and alternative hypotheses for testing whether the true percentages in each category are equal. e. Calculate the x² test statistic for testing the hypotheses in part d. f. Give the rejection region for the test using a g. Use the results, parts e and f, to make the appropriate conclusion. h. Find and interpret a 95% confidence interval for the proportion of all Americans who feel their family has achieved the American Dream.
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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Transcribed Image Text:Pie Chart of RESPONSE
Optimistic
16.0%
Achievedlt
24.0%
Pessimistic
7.0%
OutofReach
11.0%
WithinReach
24.0%
NotSure
18.0%
![10.8
[Data Set: AMDREAM] REACHING THE AMERICAN DREAM. Refer to the
Even 2019 survey on reaching the "American Dream," Exercise 3.130. Recall
that one of the survey questions asked 1,083 Americans to complete the
sentence: "When thinking about the American Dream and my own family, I
feel..." Responses were categorized as "My family has achieved it", "It is within
reach for me", "Somewhat optimistic I will reach it", "Somewhat pessimistic I will
reach it", "It is out of reach for me", and "Not sure". The results (category
percentages) are summarized in the Minitab pie chart below.
a. Identify the categorical variable (and its levels) measured in this study.
b. Convert the percentages shown on the pie chart to raw numbers (i.e., to
values that represent the number of respondents in each category).
c. If the true percentages in each category are equal, how many of the 1,083
responses
would you expect to find in each category.
d. Specify the null and alternative hypotheses for testing whether the true
percentages in each category are equal.
e. Calculate the x? test statistic for testing the hypotheses in part d.
f. Give the rejection region for the test using a = .05.
g. Use the results, parts e and f, to make the appropriate conclusion.
h. Find and interpret a 95% confidence interval for the proportion of all
Americans who feel their family has achieved the American Dream.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F84408fc5-1239-4470-a834-65edb2f9adb3%2F40359acd-46c8-4f6e-8d4b-a1ff70d2b450%2F8eyzqys_processed.png&w=3840&q=75)
Transcribed Image Text:10.8
[Data Set: AMDREAM] REACHING THE AMERICAN DREAM. Refer to the
Even 2019 survey on reaching the "American Dream," Exercise 3.130. Recall
that one of the survey questions asked 1,083 Americans to complete the
sentence: "When thinking about the American Dream and my own family, I
feel..." Responses were categorized as "My family has achieved it", "It is within
reach for me", "Somewhat optimistic I will reach it", "Somewhat pessimistic I will
reach it", "It is out of reach for me", and "Not sure". The results (category
percentages) are summarized in the Minitab pie chart below.
a. Identify the categorical variable (and its levels) measured in this study.
b. Convert the percentages shown on the pie chart to raw numbers (i.e., to
values that represent the number of respondents in each category).
c. If the true percentages in each category are equal, how many of the 1,083
responses
would you expect to find in each category.
d. Specify the null and alternative hypotheses for testing whether the true
percentages in each category are equal.
e. Calculate the x? test statistic for testing the hypotheses in part d.
f. Give the rejection region for the test using a = .05.
g. Use the results, parts e and f, to make the appropriate conclusion.
h. Find and interpret a 95% confidence interval for the proportion of all
Americans who feel their family has achieved the American Dream.
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