# Statistics final exam review

## Statistics review questions

Suppose the sample size in this study had been 50, rather than You draw a sample of size 30 from a normally distributed population with a standard deviation of four. It is assumed that the patient does not have cancer. Thus, you may find it helpful to ask a friend to select problems from an introductory statistics textbook there are many , have them cover up any instructions like "use a one-sample t-test to Comparing graphs of the standard normal distribution z-distribution and a t-distribution with 15 degrees of freedom df , how do they differ? To test this, you draw a random sample of for each and record whether they have cable service. Suppose your sample size had been 30 rather than

Comparing graphs of the standard normal distribution z-distribution and a t-distribution with 15 degrees of freedom dfhow are they similar?

Assume the population proportion is 0.

You want to know if proportion of homes with cable television service differs between Community A and Community B. You randomly assign 80 volunteer subjects to either the experimental new drug or control standard treatment conditions.

## Stats 145 final exam

Calculate the effect size and interpret it. You may be given JMP output and asked to interpret it. A published study says that 95 percent of American children are vaccinated against measles, with a standard deviation of 1. You conduct a poll of randomly selected city residents, asking them if they own an automobile. You are interested in whether the same proportion in your community own cars. Based on your sample results, what is your decision? What is your conclusion? Use an estimated population proportion of 0. What distribution will you use for this test, and why? Published information indicates that, on average, college students spend less than 20 hours studying per week. You randomly assign 80 volunteer subjects to either the experimental new drug or control standard treatment conditions. A new blood test is being developed to screen patients for cancer. You also will be asked some questions that are not attached to specific data.

You are investigating the effectiveness of a new math textbook for high school students. It is assumed that the patient does not have cancer.

You draw a sample of 25 students from your college, and find the sample mean to be Suppose the mean for your sample was Use an alpha level of 0. To test this, you draw a random sample of for each and record whether they have cable service.

To test this, you draw random samples of 50 science and 50 humanities students from your college, and record how much each spent last semester on textbooks. Nationally, 80 percent of adults own an automobile.

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