Chapter 1

Question 1

variance

Answer 1

s^2

Question 2

standard deviation

Answer 2

s

Question 3

What is the pointer?

Answer 3

After numerically organizing data and calculating the pointer (p(n+1)), the result indicates the place in the ordered data where the pth percentile value is located. For example, if the result of p(n+1) is 3.25, then the pth percentile is located between the 3rd and 4th data point. Take the average of the 3rd and 4th value to obtain the percentile value.

Question 4

What is a percentile?

Answer 4

The pth percentile is the value such that p% of the sample is below