Blog

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

The smallest score in a population is X = 5 and the largest score is X = 10.  Based on this information, you can conclude that ____.

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

There is a six-point difference between two sample means.  If the two samples have the same variance, then which of the following values for the variance would make the mean difference easiest to see in a graph showing the two distributions?

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?

For an ANOVA, what is the expected value for the F-ratio when the null hypothesis is true?

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

For an independent-measures research study, the data show a 10-point difference between the two treatment means and a pooled variance of 4. Given this information, the value of Cohen’s d is:

A normal distribution has a mean of µ = 80 with s = 20. What score separates the highest 40% of the distribution from the rest of the scores?

One sample with n = 4 scores has a mean of M = 12, and a second sample with n = 6 scores has a mean of M = 8.  If the two samples are combined, what is the mean for the combined set of scores?