A political analyst believes that a senator's recent decision to support a bill resulted in a drop of approval ratings. To test this claim, he selects random cities in the state that voted the senator in and compares the approval ratings before the decision to the approval ratings after the decision. If we let d = approval rating after approval rating before, based on the data below, what are the test statistic and degrees of freedom of an appropriate hypothesis test? Assume that the approval ratings are normally distributed. Round the test statistic to three decimal places. Provide your answer below. 1= Approval Rating Before (percent) 58.9 54.7 52.1 50.2 54.3 50.7 61.2 49.6 Approval Rating After (percent) 56.2 52.1 49.6 49.3 54.1 48.6 54.7 46.1
A political analyst believes that a senator's recent decision to support a bill resulted in a drop of approval ratings. To test this claim, he selects random cities in the state that voted the senator in and compares the approval ratings before the decision to the approval ratings after the decision. If we let d = approval rating after approval rating before, based on the data below, what are the test statistic and degrees of freedom of an appropriate hypothesis test? Assume that the approval ratings are normally distributed. Round the test statistic to three decimal places. Provide your answer below. 1= Approval Rating Before (percent) 58.9 54.7 52.1 50.2 54.3 50.7 61.2 49.6 Approval Rating After (percent) 56.2 52.1 49.6 49.3 54.1 48.6 54.7 46.1
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:A political analyst believes that a senator's recent decision to support a bill resulted in a drop of approval ratings. To test this
claim, he selects random cities in the state that voted the senator in and compares the approval ratings before the decision
to the approval ratings after the decision. If we let d = approval rating after approval rating before, based on the data
below, what are the test statistic and degrees of freedom of an appropriate hypothesis test? Assume that the approval
ratings are normally distributed. Round the test statistic to three decimal places.
Provide your answer below.
1=
Approval Rating Before
(percent)
58.9
54.7
52.1
50.2
54.3
50.7
61.2
49.6
Approval Rating After
(percent)
56.2
52.1
49.6
49.3
54.1
48.6
54.7
46.1
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