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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Espa Many people believe that the average number of Facebook friends is 145. The population standard deviation is 36.6. A random sample of 46 high school students in a particular county revealed that the average number of Facebook friends was 149. At a = 0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 145? Part: 0/5 Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. O

Is this fully simplifed ?