To study the effectiveness of treatments for insomnia, a health psychologist conducted a study with 12 participants. Four participants were instructed to count sheep (Sheep Condition), four were told to concentrate on their breathing (Breathing Condition), and four were not given any special instructions. Over the next few days, measures were taken of how many minutes it took each participant to fall asleep. The average times for the participants in the Sheep Condition were 14, 28, 27, and 31; for those in the Breathing Condition, 25, 22, 17, and 14; and for those in the control condition, 45, 33, 30, and 41.Do these results suggest that the different techniques have different effects? (Use the .05 significance level.)a. Use the five steps of hypothesis testing.b. Sketch the distribution involved.c. Explain your findings including: the logic of comparing within-group to between-group population variance estimates, how each of these is figured, and the F distribution.

In an ANOVA, if the between-group variance estimate is 640 and the within-group variance estimate is 110, the F ratio is __________.

Consider a study in which the population variance estimate based on an experimental group of 10 participants is 70, and the population variance estimate based on a control group of 20 participants is 50. Show your work and Compute the pooled estimate of population variance.

An organizational psychologist conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a job-skills training program. The cutoff t needed is -1.833. The standard deviation of the distribution of means of change scores is 2.0, and the mean change score for the sample studied is an increase of 5.2. What is the t score?

Suppose a study has a sample mean of 95, the mean of Population 2 is 75, and the standard deviation of the distribution of means is 5. Using a single-sample t test, what is the t score?

Ratio and Proportion 28)  871 satellite dishes to 1335 houses.  How many houses to 1 satellite dish? Round to the nearest whole number

Ratio and Proportion 27)  216 pies to 27 sales.  How many pies are to 2 sales?

Solve 35)

Divide 22)

Divide 16)