1)The table below shows the numbers of twodash

to fivedashbedroom

houses in a particular neighborhood.

Number of Bedrooms2 3 4 5

Frequency 7 35 56 27

What is the standard deviation for the number of bedrooms in a house in this neighborhood?

A.)0.700

B.)1.722

C.)1.137

D.)0.830

A random sample of 24

college men's basketball games during the last season had an average attendance of 5,138

with a sample standard deviation of 1767

Complete parts a and b below.

a. Construct an 80% confidence interval to estimate the average attendance of a college men's basketball game during the last season.

The 80% confidence interval to estimate the average attendance of a college men's basketball game during the last season is from a lower limit of ___

to an upper limit____ .

(Round to the nearest whole numbers.)

b. What assumptions need to be made about this population?

A.

The only assumption needed is that the population follows the normal distribution.

B.

The only assumption needed is that the population follows the Student's t-distribution.

C.

The only assumption needed is that the population distribution is skewed to one side.

D.

The only assumption needed is that the population size is larger than 30.

A car dealership would like to estimate the number of years owners keep the cars that they purchased as a new vehicle. The following data shows the age of seven vehicles that were sold for the first time by their owners. What is the point estimate for the age of cars sold for the first time?

4

12

3

10

7

4

5

A.)3.50

B.)6.43

C.)5.72

D.)4.86