What is the variance of the number set: 1, 2, 2, 5, 5, 5, 5, 10, 20, 45?

A distribution with µ = 35 and σ = 8 is being standardized so that the new mean and standard deviation will be µ = 50 and σ = 10.  In the new, standardized distribution your score is X = 45.  What was your score in the original distribution?

A repeated-measures study and an independent-measures study both produced a t statistic with df = 16.  How many individuals participated in each study?

If a repeated-measures study shows a significant difference between two treatments with alpha = .01, then you can be sure that ____.

A professor wants to conduct an independent measures design. He has 5 different treatment conditions and needs n = 20 people for each treatment. How many participants does he need for the experiment?

A researcher conducts an experiment to determine whether moderate doses of St. Johns wort have any effect on memory for college students.  For this study, what is the independent variable?

An independent-measures research study uses two samples, each with n = 12, to compare two treatments. If the results are evaluated with a t statistic using a two-tailed test with α = .05, then what are the boundaries for the critical region?

A sample of n = 4 scores is selected from a population with an unknown mean.  The sample has a mean of M = 40 and a variance of s2 = 16.  Which of the following is the correct 90% confidence interval for µ?

A population of N = 10 scores has a mean of µ = 6.  After one score is removed, the mean is found to be µ = 5.  What is the value of the score that was removed?

A population has µ = 50 and s = 5.  If 10 points are added to every score in the population, then what are the new values for the mean and standard deviation?