The time spent (in days) waiting for a kidney transplant for people ages 35-49 can be...

Question

Question

The time spent (in days) waiting for a kidney transplant for people ages 35-49 can be...

The time spent (in days) waiting for a kidney transplant for people ages 35-49 can be approximiated by the normal distribution, as shown in the figure to the right.

(a) What waiting time represents the

8080th

percentile?

(b) What waiting time represents the first quartile?

169017901590Days

mu equals 1690μ=1690

sigma equals 210.7σ=210.7

x x y graph

Click to view page 1 of the Standard Normal Table.

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Click to view page 2 of the Standard Normal Table.

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(a) The waiting time that represents the

8080th

percentile is

nothing

days.

(Round to the nearest integer as needed.)

(b) The waiting time that represents the first quartile is

nothing

days.

(Round to the nearest integer as needed.)

math Statistics-And-Probability

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Answer 1

Answer #1

Pth percentile = Mean + Z * Standard deviation , Where Z is critical value

a)

80th percentile = 1690 + 0.8416 * 210.7

= 1867

b)

First quartile = 25th percentile

= 1690 + (-0.6745) * 210.7

= 1548

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Answer 2

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