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# Refer to Exercise 4. Find a 99% lower confidence bound for ISBN: 9780073401331 38

## Solution for problem 8E Chapter 5.2

Statistics for Engineers and Scientists | 4th Edition

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Problem 8E

Refer to Exercise 4. Find a 99% lower confidence bound for the proportion of HIV-positive smokers who have used a nicotine patch.

Step-by-Step Solution:

Step 1 of 3:

Here our aim is to find a 99% lower confidence bound for the proportion of HIV- positive smokers who have used a nicotine.

Step  2 of 3:

Let X = The number of  HIV- positive smokers who have used a nicotine.

Therefore, Where, the sample size n = 444,  X = 170.

A 99% lower confidence bound for ‘p’ is given by Where, = 444 + 4

= 448. = = 0.3839

Here we have to find 99% confidence interval, let .

Now,

...

Step 2 of 3

Step 3 of 3

##### ISBN: 9780073401331

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