Question

Use this problem to answer questions 6-13. The following data came from an international study addressing a possible relationship between age at first birth (that is, the birth of a woman's first child) and subsequent development of breast cancer fall women in this study lived at least to age 40). We would like to see if women who wait until later ages to have children are more likely to eventually develop breast cancer. Age at first birth $25 1526 5834 7360 25 1694 4391 6085 Breast cancer 3220 No breast cancer 10225 13445

Answer 1

Q. 11)

Here in the table values gives for the age of women at the birth of the first child and developing breast cancer after that.

so here probabilities are developing breast cancer after the birth of the first child.

Therefore Anwer will be a) and b) together.

12)  

Here we will conduct two proportion test.( two sample Z test)

Because we want to find the proportion of developing breast cancer is more in the women who wait >25 years to have the first child then the that of < 25 years.