In the Mammography Experience Study individuals were surveyed on their mammography experience (never, within 1 year, over 1 year) and whether or not they have a mother or sister with a history of breast cancer (No, Yes). Use the bar chart in Figure 4.42, based on the ???? = 412 responses of the women included in the Mammography Experience data set, to answer the following.

(a) Estimate the percentage of women who have a mother or sister with a history of breast cancer.

(b) Estimate the percentage of women who have had a mammography experience and have a mother or sister with a history of breast cancer.

(c) Estimate the percentage of women who have never had a mammography experience and whose mother and sister have no history of breast cancer.

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60 60 50 50 40 Percent 30 30 20 20 10 10 0 HIST No Yes No Yes ME Never Over 1 year No Yes Within 1 year