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)

Ratio and Proportion 26)  500 people for 3000 tickets.  How many tickets will one person receive?

Divide 18)