Question

Chapter 11 Estimation and Confidence Intervals - Please answer 2-4

Practice 2) Estimation for the one-sample t Test

In chapter 9, we computed a one-sample t test examining the social functioning of relatives of individuals with OCD compared to the general healthy population.

In 18 participants, M = 62.00; SD = 20.94

Find the 95% CI for these data

Practice 3) Estimation for the two-independent-sample t test

In chapter 9, we tested the mean difference of calorie consumption between two independent groups given the same buffet: One group was instructed to eat fast, and another group was instructed to eat slowly. In a sample of 12 participants, we recorded M=600 in Grout Eating Slowly and M=650 in Group Eating Fast with an estimated standard error for the difference of S_M1-M2 = 82.66. Here we will find the 95% confidence interval for these data.

Practice 4) Estimation for the Related-Sample t Test

In chapter 10, we tested if teacher supervision influences the time that elementary school children read. The difference in time spent reading in the presence versus absence of a teacher was M_D=15 (n=8); the estimated standard error for the difference was S_MD=5.35. Here we will find the 95% confidence interval for these data.

Answer 1