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Calculate the Z score given the following information. The mean = 70, the standard deviation = 4, and the raw score = 86

Two variables are said to interact when ____.

The first sample from an independent-measures study has n = 9 with a variance of s2 = 35. The second sample has n = 3 and s2 = 40. What is the df value for the t statistic?

A researcher used a sample of n = 60 individuals to determine whether there are any preferences among four brands of pizza.  Each individual tastes all four brands and selects his/her favorite.  If the data are evaluated with a chi-square test for goodness of fit using a = .05, then how large does the chi-square statistic need to be to reject the null hypothesis?

A Factorial ANOVA has 8 levels for factor A and 4 levels for factor B and uses 5 participants in each treatment condition. What is the total number of participants needed for the study?

Which z-score is farthest from the mean?

If dfBetween_Groups = 2, dfWithin_Groups = 5, and dferror = 3, what is the proper presentation of your statistical results from a repeated-measures ANOVA, given that you rejected the null hypothesis?

On Halloween, Oprah puts candy out in a bowl – there are 20 Reese’s, 25 Junior Mint boxes, and 15 Laffy Taffy’s. When the first tricker-treater comes by, what is the probability they choose a Laffy Taffy?

Students in Dr. Gallimore’s class took an exam; the mean was an 85 with a standard deviation of 2. What was the proportion of students receiving an exam score between 88-92?

The first sample from an independent-measures study has n = 4 with SS = 100. The second sample has n = 8 and SS = 140. What is the pooled variance?