Question

Using the following data set, which values have a z-score over 2? 144, 160, 154, 162, 179, 148, 197, 177, 166, 173, 154, 184, 183, 132, 157, 129, 151, 162, 209, 159, 150, 190, 175, 136, 117

Answer 1

Refer Explanation Section

Explanation:

The steps involved in the calculation of `z` values are as follows:
Calculate mean of the series.
Calculate the Standard Deviation of the series.
Finally calculate the `z` values for each `x` values using the formula `z=sum(x-barx)/sigma`

According to the calculation the `z` value of `209` is greater than `2`
Refer the table given below -

Normal Distribution Part 2