If you take two random samples from a population you will probably get two different means for the samples. What causes this?
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A Pearson correlation is computed for a sample of n = 18 pai…
A Pearson correlation is computed for a sample of n = 18 pairs of X and Y values. What correlations are statistically significant with a = .05, two tails?
For a population with µ = 60, which of the following values…
For a population with µ = 60, which of the following values for the population standard deviation would cause X = 68 to have the most extreme position in the distribution (i.e., furthest distance from the center of the distribution) ?
Which of the following z-score values represents the locatio…
Which of the following z-score values represents the location closest to the mean?
An analysis of variance produces SSbetween = 40 and MSbetwee…
An analysis of variance produces SSbetween = 40 and MSbetween = 20. In this analysis, how many treatment conditions are being compared?
A repeated-measures experiment compares three treatment cond…
A repeated-measures experiment compares three treatment conditions with a sample of 10 participants. If the data are analyzed with ANOVA, the analysis would have dftotal = ____.
A two-factor experiment with 6 levels of factor A and 8 leve…
A two-factor experiment with 6 levels of factor A and 8 levels of factor B would consist of ____ separate treatment conditions and the dfFactor B would be ____.
A population with µ = 85 and σ = 12 is transformed into z-sc…
A population with µ = 85 and σ = 12 is transformed into z-scores. After the transformation, what is the standard deviation for the population of z-scores?
A repeated-measures ANOVA produced an F-ratio of F = 4.00 wi…
A repeated-measures ANOVA produced an F-ratio of F = 4.00 with df = 1, 14. If the same data were analyzed with a repeated-measures t test, what value would be obtained for the t statistic?
A researcher would like to evaluate the effect of a new read…
A researcher would like to evaluate the effect of a new reading program for second-grade students. She has half of the second-grade students use the new reading program for the first half of the school year and use the current reading program for the second half of the year. The other half of the second-grade students use the current reading program for the first half of the school year and use the new reading program for the second half of the year. The researcher plans to use the data from this study to test whether the new program has had a significant effect on reading scores. Which of the following hypothesis tests would be appropriate?