Please type the answer only no explanation is required

Question 5: A sample of assistant professors on the business faculty at state supported institutions in Ohio revealed the mean income to be $72,000 for 9 months with a standard deviation of $3,000. Using Chebyshev's Theorem, what proportion of the faculty earns more than $66,000 but less than $78,000?

Group of answer choices

At least 75%

At least 25%

At least 50%

At least 100%

Question 6

The monthly salaries of a sample of 100 employees were rounded to the nearest ten dollars. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?

Group of answer choices

$100

$150

None of the above

$50

$200

Question 7

A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical Rule, about 95 percent of the monthly food expenditures are between what two amounts?

Group of answer choices

$100 and $200

$205 and $220

$85 and $105

$110 and $190

Question 8

A question in a market survey asks for a respondent's favorite car color.

Which measure of central location should be used to summarize this question?

Group of answer choices

Mean

Geometric mean

Mode

Median