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Chapter 6: Q.6.69 (page 390)

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.3days and a standard deviation of 2.1days.

The 90thpercentile for recovery times is

a. 8.89

b. 7.07

c. 7.99

d. 4.32

Short Answer

Expert verified

The 90thpercentile of recovery time will be option c that is7.99.

Step by step solution

01

Given information

Given in the question that

Mean=5.3

Standard deviation2.1

02

solution

Here X be the 90thpercentile

So, it can be calculated as

PX<X鈥�=0.90

Here we need to find X using Excel function NORM.INV

X鈥�=NORM.INV(0.90,5.3,2.1)

X鈥�=7.99

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