Caroline Elliott

2022-01-28

On a standard measure of hearing ability the mean is 300 and the standard deviation is 20. What is the z-score for a person who scores 260?

Kaitlynn Noble

Beginner2022-01-29Added 12 answers

Explanation:

Using the formula$z=\frac{x-\stackrel{\u2015}{x}}{s}$ where x is the data point you're evaluating, $\stackrel{\u2015}{x}$ is the mean of the data set, and s is the sample standard deviation, we plug in the numbers were given to get:

$z=\frac{260-300}{20}=-2$

Using the formula

primenamaqm

Beginner2022-01-30Added 12 answers

Z score for someone with 260:

It is simply how many units of "20" the persion deviates from the mean "300". The person who scores 260 deviates two standard deviations of "20" from the mean.

$\frac{260-300}{20}=-2$

It is simply how many units of "20" the persion deviates from the mean "300". The person who scores 260 deviates two standard deviations of "20" from the mean.

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