n=15,M=2.00,SD=1.56

1. A social psychologist notes that the average time a person spends on social media is 2 hours a day. The researcher wants to test whether new parents spend more or less time than 2 hours on social media. She records the following number of hours spent on social media in a sample of 15 new parents: 0, 4, 1, 2, 2, 3, 0, 4, 3, 5, 2, 1, 1, 0, 2.

a. Test the hypothesis of whether new parents spend more or less than 2 hours a day on social media using a .05 level of significance. State the value of the test statistic and the decision to retain or reject the null hypothesis.

b. Compute effect size using estimated Cohen's d.

n=8,M=3.00,SD=1.51

2. A school psychologist notes that the average number of times that students are disruptive during class is 1.4 ( = 1.4) times per day. Following recent classroom policy changes, the psychologist tests if the number of disruptions during class has changed. He records the following number of disruptions observed during a class day: 2, 4, 3, 5, 4, 1, 1, and 4.

a. Test the hypothesis that the number of complaints has increased or decreased using a .05 level of significance. State the value for the test statistic and the decision to retain or reject the null hypothesis.

b. Compute effect size using estimated Cohen's d.