# Question: Refer to Exercise 2 65 p 59 and the Teaching of

Refer to Exercise 2.65 (p. 59) and the Teaching of Psychology (May 1998) study in which students assisted in the training of zoo animals. A sample of 15 psychology students rated “The Training Game” as a “great” method of understanding the animal’s perspective during training on a 7-1 point scale (where 1 = strongly disagree and 7 = strongly agree).The mean response was 5.87, with a standard deviation of 1.51.

a. Construct a 95% confidence interval for the true mean response of the students.

b. Suppose you want to reduce the width of the 95% confidence interval to half the size obtained in part a. How many students are required in the sample in order to obtain the desired confidence interval width?

a. Construct a 95% confidence interval for the true mean response of the students.

b. Suppose you want to reduce the width of the 95% confidence interval to half the size obtained in part a. How many students are required in the sample in order to obtain the desired confidence interval width?

**View Solution:**## Answer to relevant Questions

Suppose it is now 1 year after the poisoning was traced to ice cream bars. The manufacturer wishes to estimate the proportion who still will not purchase bars to within .02, using a 95% confidence interval. How many ...Consider a test of H0: μ = 4. In each of the following cases, give the rejection region for the test in terms of the z-statistic: a. Ha: μ >,4 a = .05 b. Ha: μ > 4, a = .10 c. Ha: μ < 4, a = .05 d. Ha: μ ≠ 4, a = ...For what values of the test statistic do you reject H0? fail to reject H0? How does the observed significance level (p -alue) of a test differ from the value of a? The following sample of six measurements was randomly selected from a normally distributed population: 1, 3, -1, 5, 1, 2. a. Test the null hypothesis that the mean of the population is 3 against the alternative hypothesis, ...Post your question