Question

The mean monthly rent of students at Oxnard University is $820 with a standard deviation of $217.

(a) John's rent is $1,325. What is his standardized z-score? (Round your answer to 3 decimal places.)
(b) Is John's rent an outlier?
(c) How high would the rent have to be to qualify as an outlier?

Answer 1

Explanation:

John's rent is 1325 - 820 = 505 MORE per month

this is 505 / 217 = + 2.327 standard deviations above the mean

z - score = + 2.327

b) not an outlier.....it under the bell curve 3 standard deviation limits

c) > 3 S.D. would be an outlier 3 x 217 = 651 above the mean

would be 820 + 651 = $1471