Question

What value has a z-score of -0.67, if the mean is 18 and the standard deviation is 1.68?

0 -19.93
16.87
+
O 17.36
20.18
O 19.13

Answer 1

The data point is 1.6 standard deviations above the mean.
Explanation:
Z-score
It is the number of standard deviations from the mean that a data point is. It's a measure of how many standard deviations below or above the population mean a raw score is.
A Z-score is also known as a standard score and it can be placed on a normal distribution curve.
As in this case the Z-score is +1.6, so it means the data point is 1.6 standard deviations above the mean. Hope this helps I am kinda knew to this so I hope I helped you