Practice Exams Psychological Statistics M. Gurtman Practice Exam 1 1. Draw a bimodal distribution. Following are the scores of a group of 40 college students who took the test. Construct a frequency table showing the frequencies, percentages, and cumulative percentages. A popular test of assertiveness has a mean of 27.50 and a standard deviation of 6.73.
Higher scores indicate more assertive and interpersonally self-confident individuals.
Assume that the scores on assertiveness are normally distributed. Subjects were weighed and also completed a self-esteem questionnaire. In the space to the right of the data, do a scatterplot of the data. Calculate the correlation coefficient. Generate a regression equation that would allow you to predict a person's self-esteem from weight in this sample.