I was given the following question. A new young mother has opened a cloth diaper

Question

I was given the following question.

A new young mother has opened a cloth diaper service. She is interested in simulating the number of diapers required for a one-year-old. She hopes to use this data to show the cost effectiveness of cloth diapers. The table below shows the number of diapers demanded daily and the probabilities associated with each level of demand.

Daily Demand

Probability

Range of 2-digit RNs

5

0.30

01-30

6

0.50

31-80

7

0.05

81-85

8

0.15

86-00

What is the cumulative probability that demand is more than 6?

Select one:

a. 0.85

b. 0.70

c. 0.20

d. 0.15

e. 0.55

Daily Demand

Probability

Range of 2-digit RNs

5

0.30

01-30

6

0.50

31-80

7

0.05

81-85

8

0.15

86-00

Explanation / Answer

Since the question asks for demand greater than 6, we take the cummulative probabilities of dail demand of 7 & 8. This is given by 0.05 and 0.15 respectively.

Therefore, the cummulative probability that demand is more than 6 is 0.05 + 0.15 = 0.20

Answer: (c) - 0.20

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