Consider the data set.

• 2,4,5,6,7

(b)

Use the defining formula to compute the sample standard deviations. (Enter a number. Round to two decimal places.)

(c)

Use the defining formula to compute the population standard deviation. (Enter a number. Round to two decimal places.)

Raul received a score of78on a history test for which the class mean was 70 with a standard deviation of3. He received a score of79on a biology test for which the class mean was 70 with standard deviation6. On which test did he do better relative to the rest of the class?

biology test

history test

the same

Assume thatxhas a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round to four decimal places.)

=26;=4.2