Expand Previous Next Check 0/3 ptsRetries 100 The mean GPA for 50 students was 3.02 and the standard deviation was 0.3. Assume that the distribution of GPAs is unimodal and symmetric. The percentage of data that occurs within one standard deviation of the mean should be Select an answer The percentage of data that occurs within two standard deviations of the mean should be Select an answer The percentage of data that occurs within three standard deviations of the mean should be Select an answer