Massey

Mathematics

7 December, 07:20

We collected a sample of the prices of new homes. The mean of our sample is $250,000, with a standard deviation of $15,000. Calculate the z-scores of each of the given prices. Determine if the they are usual or unusual. Round up each z-score to two decimals.

(a) $200, 000

(b) $155,000

(c) $275,000

(d) $322,000

Choose one •

A

-3.33, unusual

-6.33, unusual

1.67, usual

4.80, unusual

B

3.33, usual

6.33, unusual

-1.67, usual

-4.80, unusual

C

-3.33, usual

-6.33, usual

-1.67, unusual

-4.80, usual

D

3.33, unusual

6.33, unusual

1.67, usual

4.80, unusual