A researcher is performing a directional (one-tailed) one-sample t-test with a sample of n = 35 to evaluate the effect of a treatment that is predicted to decrease scores. If the researcher obtains t = –1.700, then what decision should be made?

How many separate treatment groups would be needed for a two-factor, independent-measures research study with 4 levels of factor A and 5 levels of factor B?

Which of the following is an example of a continuous variable?

What values are specified by the null hypothesis for the chi-square test for goodness of fit?

A researcher is performing a directional (one-tailed) one-sample t-test with a sample of n = 35 to evaluate the effect of a treatment that is predicted to decrease scores. If the researcher obtains t = –1.700, then what decision should be made?

The results of a two-factor analysis of variance produce df = 1, 30 for the F-ratio for factor A, and df = 2, 30 for the F-ratio for the AxB interaction.  Based on this information, how many levels of factor B were compared in the study?

For a two-factor experiment with 2 levels of factor A and 3 levels of factor B and 10 subjects in each treatment condition, how many participants are in each level of factor A?

A researcher a UW-Madison tracked sophomore students sleep schedules (X) and exam scores (Y). The exam scores can be modeled using the equation Y = 6.63x + 24.33. If a student wants to get 84 points on the next exam, approximately how many hours should they sleep?

A set of n = 70 pairs of scores (X and Yvalues) produces a regression equation of Ŷ = 9X + 18. Find the predicted Y value for an X score of -7.

A researcher is conducting a chi-square test for independence to evaluate the relationship between gender and preference for three different designs for a new automobile.  Each individual in a sample of 30 males and 30 females selects a favorite design from the three choices. If the researcher obtains a chi-square statistic of X2 = 4.81, what is the appropriate statistical decision for the test?