Asample of restaurants in a city showed that the average cost of a glass of iced tea is $1.25 with a a standard deviation of 7¢. three of the restaurants charge 95¢, $1.00, and $1.35. determine the z-value for each restaurant.

The z value for each restaurant is -4.28, -3.57 and 1.42.                            

Step-by-step explanation:

Given : A sample of restaurants in a city showed that the average cost of a glass of iced tea is $1.25 with a a standard deviation of 7¢. Three of the restaurants charge 95¢, $1.00, and $1.35.

To find : Determine the z-value for each restaurant?

Solution :

We have given,

The average cost of a glass of iced tea i.e. mean is

$1=100 cent

1 cent = $0.01

7¢=$0.07

A standard deviation is

The x values given is 95¢=$0.95, $1.00, and $1.35

The formula to find the z-score value is

For x=$0.95

For x=$1

For x=$1.35

The z value for each restaurant is -4.28, -3.57 and 1.42.

justin bieber ml.