1. compute the z score value for a score of 85 on a test which has a mean of 75 and a standard deviation of 5.

ANSWER

The z-score is 2.

EXPLANATION

The z-score for a data set that is normally distributed is calculated using the formula:

where

is the mean and

is the standard deviation of the distribution.

From the given information the test score is 85.

This implies that,

The mean is 75.

The standard deviation is 5.

We substitute the values into the formula to get,

This implies that

Therefore the z-score is

the answer to this in exact form is 4/35 but in decimal form its 0.1142857

hope this if needed hmu

it is a horizontal line.