Question

Find z if X=27, μ=20, and α=3.4. Round to the nearest hundredth if necessary.

Answer 1

Answer:

A. $Z=2.06$

Step-by-step explanation:

We want to find the Z-score of $X=27$ if the population mean is $\mu=20$,and the population standard deviation is $\sigma=3.4$.

We use the formula:

$Z=\frac{X-\mu}{\sigma}$

We substitute the values to obtain:

$Z=\frac{27-20}{3.4}$

$Z=\frac{7}{3.4}$

$Z=2.06$

The correct answer is A.