In a survey of 1,200 airline travelers, 820 responded that the airline fee that is most unreasonable is additional charges to redeem points/miles. construct a 95% confidence interval estimate for the population proportion of airline travelers who think that the airline fee that is most unreasonable is additional charges to redeem points/miles.
1. a 95% confidence interval estimate for the population proportion (round to four decimal places as needed.)

A 95% confidence interval estimate for the population proportion is (0.6570, 0.7096).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence interval , 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:

In a survey of 1,200 airline travelers, 820 responded that the airline fee that is most unreasonable is additional charges to redeem points/miles. This means that

95% confidence interval

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:

A 95% confidence interval estimate for the population proportion is (0.6570, 0.7096).

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b