The mean monthly rent is students at Oxnard University is $770 with a standard deviation of $239

Johns rents is $1,275. What is his standard z-score?

Z=

How high would the rent have to be to qualify as an outlier?

Johns rent would have to be $ or higher to be considered an outlier

- Z = standard z score = Z = 2.11=2

- The rent would have to be $1487 or higher to qualify as an outlier.

Explanation:

Z =(x - ě)/ū

Where z = standard z score

X = johns rent = $1275

ě = mean rent = 770

ū = standard deviation = $239

So therefore ;

Z = (1275 - 770)/239

Z = 2.11=2

To qualify as an outlier z = +3

So therefore cost of rent. That can qualify as an outlier

3 = (x - 770)/ 239

( 3 * 239 ) + 770 = x

X = $ 1487

The rent would have to be $1487 or higher to qualify as an outlier.