Consider the following cumulative frequency distribution a1C

Consider the following cumulative frequency distribution:

a-1.Construct a frequency distribution.

a-2.How many observations are at least 45 but less than 55?

Number of observations________?

c.What percent of the observations are less than 45? (Round your answer to 1 decimal place.)

Percent of observations________?

Solution

a-1

-2.How many observations are at least 45 but less than 55?

Number of observations________70

c.What percent of the observations are less than 45? (Round your answer to 1 decimal place.)

Percent of observations________180/250 = 0.720 =72.0