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How many separate groups of participants would be needed for an independent-measures, two-factor study with 3 levels of factor A and 4 levels of factor B?

If z obtained exceeds the z critical, what decision do you make?

A sample of 30 is selected from a population with an unknown mean. The one-sample t estimation equation is used to compute the 90% confidence interval around µ. Which of the values below should be used for t in this equation?  µ = 40 ± ( t )( 4 )

Which of these would NOT be an example of a nominal category?

If z obtained exceeds the z critical, what decision do you make?

Which of the following accurately describes the observed frequencies for a chi-square test?

A repeated-measures research study uses 8 subjects.  If the within-treatment df for the ANOVA is 21, what is the value for the error df?

In a between-subjects ANOVA with three treatment conditions, all three treatments have the same mean (5.50), M1 = M2 = M3.  For these data, what is SSBetween Groups?

A sample of 20 is selected from a population with an unknown mean. The one-sample t estimation equation is used to compute the 99% confidence interval around µ. Which of the values below should be used for t in this equation?  µ = 40 ± ( t )( 4 )

Imagine that you are going to compute a 95% confidence interval. Which combination of sample characteristics would produce the narrowest interval?