Aresearcher constructs a confidence interval for a population proportion using a sample of size 50. the value of pë† is .3, and the resulting confidence interval is determined to be (.1323, .4677). what's the level of confidence for this interval? a. 80%b. 90%c. 95%d. 99%e. not enough information to answer

d. 99%

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:

Let's start from the higher confidence levels, since the higher the confidence level, the higher the width of the interval.

d. 99%

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

The lower limit is:

The upper limit is:

This is very close to the interval found, so d. is the correct answer

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.