On an exam with a M =78, you obtain a score of X = 84. Would you prefer a standard deviation of S = 2 or S =10? Explain your answer.   Using the above numbers, calculate the population mean. If 5 points were added to every score in the population, what would be the new mean and standard deviation. If every score was multiplied by five, what would be the new standard deviation?

For standard deviation, the x-x or the y-y, which numbers do you use?

Your statistics teacher splurges on five comic books, spending $1230, $70, $540, $610, and $1600 on the books. Find the following for the amount spent on the books. 3. The mean. 4. The standard deviation. 5. The coefficient of variation.

Tally is interested in the fuel efficiency of her car. She computes how many miles per gallon her car got each week for the last four weeks. The data are shown below. Miles per Gallon 28 36 56 64 She computes that the mean of the data set is 4646, but also wants to know the range and standard deviation. Find the range of this data set. miles per gallon Find the standard deviation of this data set. miles per gallon