6. The three data sets have the same mean and range, but is the variation the same? Prove your answer by com- puting the standard deviation. Assume the data were obtained from samples. a. 5,7,9, 11, 13, 15, 17 b. 5, 6,7, 11, 15, 16, 17 c. 5,5, 5, 11,17, 17, 17

A student scores 74 on a geography test and 264 on a mathematics test. The geography test has a mean of 80 and a standard deviation of 5. The mathematics test has a mean of 300 and a standard deviation of 24. If the data for both tests are normally distributed, on which test did the student score better relative to the other students in each class? OA. The student scored better on the mathematics test. OB. The student scored better on the geography test. OC. The student scored the same on both tests.

need help

1. Commute the range for baseball coaches yearly salaries. 2. Compute the mean yearly salary. 4. Compute the variance and the standard deviation for the yearly salary. Show you calculation. 4. Compute the coefficient of the variation.