For an independent-measures study, the data show a 4 point difference between the two treatment means and a pooled variance of 5. Given this information, Cohen’s d = 1.88.

A researcher conducts a one-sample t test. If the t statistic has df = 546, how many individuals were in the sample?

Which of the following is the correct null hypothesis for a repeated-measures t test? 

A researcher administers a treatment to a sample of participants selected from a population with µ = 67. If the researcher obtains a sample mean of M = 70, given α = .05, which combination of factors is most likely to result in rejecting the null hypothesis?

A researcher obtains t = 1.74 for a repeated-measures study using a sample of n = 21 pairs of scores. What is the correct statistical decision for a one-tailed test?

A two-tailed hypothesis test is being used to evaluate a treatment effect with α = .01. If the sample data produced a z score of z = 2.24, then what is the correct decision?

If one sample has n = 12 scores with SS = 29 and a second sample has n = 14 scores with SS = 29, then the pooled variance will be 2.4167 (or 2.42).

How many integer solutions are there to a + b + c + d = 15 where each of a, b, c and d are at most 5.  

Find the closed formula for the Lucas numbers.  Lucas numbers have the same recurrence relation as the Fibonacci sequence, only they start with the numbers 2 and 1.  Thus 2, 1, 3, 4, 7, 11, …

Prove n is even if and only if n2-1 is odd