A sample consists of n = 16 scores.  How many of the scores are used to calculate the range?

Calculate Σ(2X) for the numbers: 1, 4, 5, 6

If I have a mean of 400 (ΣX= 2,800 n=7) and add another score of 100, what would the new mean equal?

A sample of n = 4 scores has a standard error of 10 points.  For the same population, what is the standard error for a sample of n = 16 scores?

An 80% confidence interval for µ is computed from sample data and the interval estimate ranges from 69 to 71. This indicates that:

If the null hypothesis is true, what value is expected on average for the repeated-measures t statistic?

A researcher has changed the alpha value from α = .05 to α = .01 for his study. What impact will this have?

Calculate the raw score given the following information. Z = 2.5, M = 50, and the standard deviation = 5

Two scores are recorded for a sample of n = 5 participants. Find  ΣX + ΣY (sigma X plus sigma y). . Subject            X         Y            1          3          2            2          3          6            3          8          2            4          1          5            5          0          1

A researcher is using a repeated-measures design to test for mean differences among four treatment conditions.  If the data for this study consist of 10 scores in each treatment, then how many subjects participated in the study?