Question

What two pieces of information do you need from the population in order to calculate a z score?

1) Mean and standard deviation
2) Median and mode
3) Range and variance
4) Percentile and quartile

Answer 1

To calculate a z-score, you need the mean and standard deviation of the population.

Step-by-step explanation:

In order to calculate a z-score, you need two pieces of information from the population:

1. Mean: The average value of the data set.
2. Standard Deviation: The measure of how spread out the data is from the mean.

Using the mean and standard deviation, you can calculate the z-score for a specific value by subtracting the mean from the value and dividing it by the standard deviation.