Question

Mollys candleshop

Answer 1

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a. What is the total number of frequencies?

The total frequency is the sum of total observations i.e. 5+13+28+23+18+10+3 = 100

b.What is the class interval?

Pick any class and subtract the highest and lowest values here. Class interval is 5

c.What is the class frequency for the 20 to 25 class?

It is 18, look at the graph' 20 to 25 interval.

d.What is the relative frequency of the 20 up to 25 class? (Round your answer to 2 decimal places.)

It is this class' interval divided by total frequency = 25/100 = .25

e. What is the midpoint of the 0 up to 5 class? (Round your answer to 1 decimal place.)

It is the midpoint of the interval i.e. 0+5 / 2 = 2.5

f. On how many days were there 20 or more packages shipped?

This is summation of frequencies of beyond 20 = 18+10+3 = 31