For homework, Ari had to find 5% of $900. Did he do the work correctly? Are Ari’s calculations correct?

No. Ari multiplied the denominators incorrectly.
No. Ari should have written the percent ratio as StartFraction 5 Over 100 EndFraction
No. Ari should have divided, not multiplied.
Yes. Ari’s work is correct.

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average