Author:
Christine Farr

Problem 1)A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFOis less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis fora test of significance.Problem 2)At one school, the average amount of time that tenth-graders spend watching television eachweek is 18.4 hours. The principal introduces a campaign to encourage the students to watch lesstelevision. One year later, the principal wants to perform a hypothesis test to determine whetherthe average amount of time spent watching television per week has decreased. Formulate thenull and alternative hypotheses for the study described.Problem 3)A two-tailed test is conducted at the 5% significance level. What is the P-value required to rejectthe null hypothesis?Problem 4)A two-tailed test is conducted at the 5% significance level. What is the right tail percentilerequired to reject the null hypothesis?Problem 5)What is the difference between an Type I and a Type II error? Provide an example of both.Chapter 10Show all workProblem 1)Steven collected data from 20 college students on their emotional responses to classical music.Students listened to two 30-second segments from “The Collection from the Best of ClassicalMusic.” After listening to a segment, the students rated it on a scale from 1 to 10, with 1indicating that it “made them very sad” to 10 indicating that it “made them very happy.” Stevecomputes the total scores from each student and created a variable called “hapsad.” Steve thenconducts a one-sample t-test on the data, knowing that there is an established mean for thepublication of others that have taken this test of 6. The following is the scores:

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