# Statistics

1.The table below displays a week's worth of data on daily sales at the Crank It Louder Music Store. ??Over that time period, what was the mean daily level of sales?

A. ?$3,489.79

?B. $4,071.42

?C. $1,643.23

D. $2,829.92

2. The table below displays a week's worth of data on daily sales at the Crank It Louder Music Store. ??Over that time period, what was the median daily level of sales?

A. $1,643.23

B. ?$3,489.79

C. ?$3,130.46

D. ?$800.12

3. The histogram below displays the age distribution of the world's billionaires as reported by Forbes Magazine in 2001. ??This distribution is best described as:

?A. Approximately normal.

?B. Strongly skewed to the right.

?C. Bimodal.

D. Approximately

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?Assigning each sophomore a number and then randomly generating 70 numbers from that list.

B Randomly selecting 70 sophomores entering the university's main library on a randomly selected evening.

C ?Selecting the 70 sophomores whose grade point averages (GPA) fall closest to the mean GPA of the sophomore class.

D ?Randomly selecting 70 sophomores who are members of college fraternities.

11. A normal distribution is completely determined by: https://eproduct.hbsp.harvard.edu/eproduct/product/quant/content/item/6179/source_bibliography.xls A ?Its mean and its standard deviation.

B Its mean and its mode.

C Its mean and its median.

D None of the above.

12. The average height of American women is distributed normally, with a mean of 63.5 inches and a standard deviation of 2.5 inches. ??Approximately what percentage of American women are taller than 58.5 inches, but shorter than 68.5 inches?

A ?50%

B ?68%

C ?84%

D ?95%

13. The histogram below displays the distribution of income among households in the United States in 2001. Suppose a researcher takes a random sample of 60 households and calculates average household income in the sample. Suppose 99 other researchers conduct identical studies, each independently collecting a random sample of 60 households and computing the average household income in that sample.??Which of the following best describes