Question

In: Math

The following frequency distribution shows the number of customers who had an oil change at a...

The following frequency distribution shows the number of customers who had an oil change at a particular Jiffy Lube franchise for the past 40 days.

Number of customers

Frequency (days)

Relative Frequency

Cumulative

Relative

Frequency

25 to 34

3

35 to 44

12

45 to 54

11

55 to 64

7

65 to 74

5

75 to 84

2

Use this data to construct a relative frequency and cumulative relative frequency distribution. Report all of your answers in the table above to 3 decimal places, using conventional rounding rules.

What percent of the days are there less than 45 customers who had an oil change at this Jiffy Lube? Report your final answer to 2 decimal places, using conventional rounding rules.

ANSWER:          %

What proportion of the days were there 65 – 74 customers at this Jiffy Lube for an oil change? Report your final answer to 4 decimal places, using conventional rounding rules.

ANSWER:         

What percent of the days were there at least 55 customers at this Jiffy Lube for an oil change? Report your final answer to 2 decimal places, using conventional rounding rules.

ANSWER:          %

What is the approximate mean number of customers at this Jiffy Lube for an oil change? Report your final answer to 2 decimal places, using conventional rounding rules.

ANSWER:         

What is the approximate standard deviation of the number of customers at this Jiffy Lube for an oil change? Report your final answer to 2 decimal places, using conventional rounding rules.

ANSWER:         

What is the midpoint of the class interval with the largest frequency? Report your final answer to 2 decimal places, using conventional rounding rules.

ANSWER:         

Solutions

Expert Solution

The percent of the days are there less than 45 customers who had an oil change at this Jiffy Lube

The proportion of the days were there 65 – 74 customers at this Jiffy Lube for an oil change

The percent of the days were there at least 55 customers at this Jiffy Lube for an oil change

The approximate mean number of customers at this Jiffy Lube for an oil change

= 50.75

The approximate standard deviation of the number of customers at this Jiffy Lube for an oil change

= 13.07

The midpoint of the class interval with the largest frequency = 39.5

milcah answered 1 year ago
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