An earlier study determined that 60% of women aged over 50 have annual mammograms. to see if this proportion is still valid we send surveys to 400 women aged over 50. of the 60 who respond, 48 say they have annual mammograms. use the " plus four" method to estimate the current proportion of women aged over 50 who say they get annual mammograms with a 95% confidence interval. (round to the 4th decimal place)

The required confidence interval is (0.68 , 0.8825)

Explanation:

n=48

Confidence interval 95%

Method p = 48+2 / 60+4 = 0.781250

SE = = 0.0516748

confidence interval p ± 1.95996* = (0.679969,0.882531)

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !

answer; ///it examines the interaction between genetics and culture in shaping human biology;