Consider the following relative frequency distribution:

a. Suppose this relative frequency distribution is based on a sample of 50 observations. Construct a frequency distribution. How many of the observations are at least — 10 but less thanO?

b. Construct a cumulative frequency distribution. How many of the observations are less than 20?

c. Graph a relative frequency polygon. R-69

Transcribed Image Text:

Class Relative Frequency -20 up to -10 0.04 - 10 up to 0 0.28 0 up to 10 0.26 10 up to 20 0.22 20 up to 30 0.20