If an analysis of variance is used for the following data, what would be the effect of changing the value of SS2 to 100?Sample DataM1 = 15   M2 = 25 SS1 = 90   SS2 = 70

If the mean and variance are computed for each sample in an independent-measures two-factor experiment, then which of the following types of sample data will tend to produce large F-ratios for the two-factor ANOVA?

A research study compares the age of women who give birth and the likelihood of having a child with Down Syndrome. The study finds that the older a woman is the more likely they are to have a child with Down Syndrome. What research design does this study use?

A sample of n = 20 scores is transformed into z-scores.  What is the mean for the set of 20 z-scores?

Which of the following sets of sample data would produce the smallest value for an independent-measures t statistic?

Under what circumstances is a score that is 5 points above the mean considered a central value–meaning it is relatively close to the mean?

A researcher would like to evaluate the effect of a new reading program for second-grade students. For the past five years, a standardized test given at the end of second grade has produced a mean score of µ = 45. A sample of n = 25 students are placed in the new program and at the end of the school year they obtain a mean test score of M = 51, s = 20. The researcher plans to use these data to test whether the new program has had a significant effect on reading scores. Which of the following hypothesis tests would be appropriate?

For the population of scores shown in the frequency distribution table, the mean is ____.X    f5    24    13    32    21    2

For a normal population with µ = 40 and σ = 10 which of the following samples is least likely to be obtained?

What term is used to describe the shape of a distribution in which the scores pile up on the left-hand side of the graph and taper off to the right?