Question

17. The average cost of providing a particular service per person per day is a random variable having a normal distribution with average of N$100 and a standard deviation of N$22. This is an illustration a

Select one:

A. Discrete Probability Distribution

B. Continuous Probability Distribution

18.

If you use the information provided in Question 3.1 to calculate the probability that the cost of providing the service will be at least N$120 per day per person., then :-

Select one:

A. P ( x is greater and equal to 120 )

B. P ( x is smaller and equal to 120)

19.

Based upon the information provided above in this Question, the z-distribution will be as follows:

Select one:

A. P( Z in greater and equal to 0.91 )

B. P ( z is smaller and equal to 0.91)

C. P ( z is smaller and equal to - 0.91)

D. P ( z is greater and equal to - 0.91 )

20.

Based upon the above information obtained in this Question, which one of the following statements below is correct:

Select one:

a. Probability for the cost of the service to be at least N$120 = 31.86%

b. Probability for the cost of the service to be at least       N$120 = 81.86%

c. Probability for the cost of the service to be at least       N$120 = 18.14%

d. None of the provided

21.

The average cost of providing a particular service per person per day is a random variable having a normal distribution with average of N$100 and a standard deviation of N$22. Thus, calculate the probability that the cost of providing the service will be at most N$60 per day per person.

Select one:

A. P ( X is greater and equal to 60 )

B. P ( X is smaller and equal to 60 )

C. None of the provided

22.

The average cost of providing a particular service per person per day is a random variable having a normal distribution with average of N$100 and a standard deviation of N$22. Thus, calculate the probability that the cost of providing the service will be at most N$60 per day per person.

Select one:

A. P ( X is greater and equal to 60 )

B. P ( X is smaller and equal to 60 )

C. None of the provided

23

Based upon the above information obtained above in this Question, which one of the following statements below is correct :

Select one:

A. Probability for the cost of the service to be at most N$ 60 = 46.56%

B. Probability for the cost of the service to be at most N$ 60 = 96.56%

C. Probability for the cost of the service to be at most N$ 60 = 3.34 %

D. None of the provided

Answer 1

Solution :

17)

Option B

Continuous Probability Distribution

18)

Option A

P ( x is greater and equal to 120 )

19)

Option A

P( Z in greater and equal to 0.91 )

20)

Option C

Probability for the cost of the service to be at least       N$120 = 18.14%

21)

Option B

P ( X is smaller and equal to 60 )

22)

Option B

P ( X is smaller and equal to 60 )

23)

Option C Probability for the cost of the service to be at most N$ 60 = 3.34 %