Question

Asked Nov 21, 2019

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(a) Construct a 95% confidence interval for the proportion of false positives

produced by the test.

Step 1

Step-by-step procedure to obtain the value of using STATKEY:

- Choose
**Normal**under**Theoretical Distributions**. - In
**Normal Distribution,**click**Edit Parameters**. - Enter
**mean**as**0**and**standard deviation**as**1**and click**Ok**. - Click the Centre Proportion value in graph and enter
**95**. - Click
**Two-Tail**. - Click
**OK**.

Output using the MINITAB software is given below:

Step 2

From the output, the value of is 1.96 for 95% confidence.

Here, the number of false positives

produced by the test is 591 and the total number of positive test result is 1,584.

The sample proportion is,

Step 3

The 95% confidence interval i...

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