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
