Advertising expenses are a significant component of the cost of goods sold. Listed below is a frequency distribution showing the advertising expenditures for 50 manufacturing companies. Estimate the mean, median, and standard deviation of advertising expense. (Round the final answers to 2 decimal places.)

Advertising Expenditure ($ millions)	Number of companies
$25 to under $35	5
35 to under 45	9
45 to under 55	16
55 to under 65	11
65 to under 75	9
Total	50

Mean ?

Median ?

Standard deviation ?

Determine the mean, median, and standard deviation of the following frequency distribution: (Round the final answers to 2 decimal places.)

Class	Frequency
0 to under 5	4
5 to under 10	5
10 to under 15	14
15 to under 20	5
20 to under 25	4

Mean

Median

Standard deviation