Question

normal population has mean =μ10 and standard deviation =σ7. (a) What proportion of the population is less than 18? (b) What is the probability that a randomly chosen value will be greater than 3? Round the answers to four decimal places. Part 1 of 2 The proportion of the population less than 18 is . Part 2 of 2 The probability that a randomly chosen value will be greater than 3 is .

Answer #1

X ~ (10 , 7)

a).**the
proportion of the population is less than 18
be:-**

[ in any blank cell of excel type =NORMSDIST(1.1429) ]

b).**The
probability that a randomly chosen value will be greater than 3 is
:-**

[ using standard normal table ]

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A normal population has mean =μ9 and standard deviation =σ5.
(a) What proportion of the population is less than 20?
(b) What is the probability that a randomly chosen value will be
greater than 5?
Round the answers to four decimal places.

A normal population has mean μ = 31 and standard deviation σ =
6. (a) What proportion of the population is between 19 and 28? (b)
What is the probability that a randomly chosen value will be
between 26 and 36? Round the answers to at least four decimal
places. Part 1 of 2 The proportion of the population between 19 and
28 is . Part 2 of 2 the probability that a randomly chosen value
will be between 26...

A normal population has mean μ= 34 and standard deviation σ=
10.
(a) What proportion of the population is between 10 and 20?
(b) What is the probability that a randomly chosen value will be
between 28 and 38?
Round the answers to at least four decimal places

A normal population has mean μ =40 and standard deviation σ
=9.
(a) What proportion of the population is between 20 and 30?
(b) What is the probability that a randomly chosen value will be
between 35 and 45?
Round the answers to at least four decimal places.

A normal population has mean μ=40 and standard deviation σ
=9.
(a) What proportion of the population is between 20 and 30 ?
(b) What is the probability that a randomly chosen value will be
between 35 and 45?
Round the answers to at least four decimal places

A normal population has a mean of 61 and a standard deviation of
20. A. What proportion of the population is greater than 108? B.
What is the probability that a randomly chosen valve will be less
than 81?

A normal population has mean μ 30 = 31 and standard deviation σ=
7
(a) What proportion of the population is between 15 and 25?
(b) What is the probability that a randomly chosen value will be
between 25 and 35?
Round the answers to at least four decimal places.

A normal population has mean μ = 9 and standard
deviation σ = 6.
a.
What proportion of the population is less than 20?
b.
What is the probability that a randomly chosen value will be
greater than 5?

A normal population has a mean of 21 and a standard deviation of
3. Use Appendix B.3.
Compute the z value associated with 27. (Round your answer to 2
decimal places.) What proportion of the population is between 21
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What proportion of the population is less than 18? (Round z-score
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places.)

A normal population has a mean of 77 and a standard deviation of
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Compute the probability that the sample mean is: (Round
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decimal places.)
A. less than 76
Probability:
B. Between 76 and 78
Probability:
C. Between 78 and 79
Probability:
D. Greater than 79
Probability:

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