Combining test scores. The first Stats exam had a mean of 65 and a standard deviation of 10 points; the second 55°

8°

74°

36°F 10°

-2

-1.88.

Median = 2° IQR = 16°

Mean = 1° Standard deviation = 7°

Maximum temperature = 11°C Range = 33°

°F = 9>5°C + 32.

Q3 = 30 Median = 28 IQR = 6

= 19 Mean = 27 = 3 SAT = 40 * ACT + 150;

had a mean of 80 and a standard deviation of 5 points.

Derrick scored an 80 on both tests. Julie scored a 70 on the first test and a 90 on the second. They both totaled 160 points on the two exams, but Julie claims that her total is better. Explain.