In a survey of 474 u. s. women, 365 said that the media has a negative effect on women's health because they set unattainable standards for appearance. let p denote the proportion of all women who think media has a negative impact on women's health because they set unattainable standards for appearance. find a point estimate for p and also construct a 95% confidence interval for p. a. 7700, (.7321, .8079)b .2300, (.1921, -2679)c. 365, (.7683, .7717)d. 365, (.7507, .7893)e .7700, (.7507, .7893).

a. 7700, (.7321, .8079)

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 474 U.S. women, 365 said that the media has a negative effect on women's health because they set unattainable standards for appearance. This means that . The point estimate is 0.77.

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:

The correct answer is:

a. 7700, (.7321, .8079)

true

explanation: