Acancer research group was interested in determining the percentage of women 40 years or older that have regularly scheduled mammograms. to accomplish this, they surveyed 500 women in this age group and, based on 155 women that responded affirmatively, estimated the percentage of all women in this age group that have regularly scheduled mammograms. this process is an example of:
nonparametric statistics
nominal data
descriptive statistics
inferential statistics
census

Inferential statistics

Explanation:

Inferential statistics is a research plan through which a researcher can make predictions or inferences from that data. With inferential statistics, one can take the sample from the population and generalized it  

There are two areas of inferential statistics:

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 !

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