Suppose a sample of 518518 people is drawn. Of these people, 150150 passed out. Using the data, construct the 85%85% confidence interval for the population proportion of people who black out at G forces greater than 66. Round your answers to three decimal places.

The 85% confidence interval for the population proportion of people who black out at G forces greater than 66 is (0.261, 0.319)

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

In which

z is the zscore that has a pvalue of .

For this problem, we have that:

85% confidence level

So , z is the value of Z that has a pvalue of , so .

The lower limit of this interval is:

The upper limit of this interval is:

The 85% confidence interval for the population proportion of people who black out at G forces greater than 66 is (0.261, 0.319)

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