Question

The deviation of a value (x) from the mean of the sample divided by the standard deviation (s)of the sample is known as the "z" value or z-score.

True
False

Answer 1

TRUE.

Step-by-step explanation:

It's in an assignment I'm doing.

Also, THERE ARE WAYS TO FIND THE AREA UNDER A NORMAL CURVE is also TRUE

Answer 2

Answer: False

Step-by-step explanation:
By definition, the z-score of the random variable, x, is

`z = (x - \mu)/(\sigma)`
where
μ = the population mean
σ = the population standard deviation

Because only the sample mean and the sample standard deviations are known, we cannot calculate the z-score. Instead, we can calculate the Student t-test statistic.