medical research study reported tha t women whose mothers took the drug DES duri

Question

medical research study reported tha t women whose mothers took the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as were women whose mothers did not take the drug. aThis study compared two populations, what were the populations? mothers took DES during pregnancy and women whose mothers did not . b. Do you suppose the data were obtained in a survey or in an experiment? Survey c. For the population of women whose mothers took the drug DES during pregnancy, a sample of 3980 women showed that 63 developed tissue abnormelities that might lead to cancer. Provide a descriptive statistic (to 1 decimal) that could be used to estimate the number of women out of 1000 in this population who have tissue abnormalities 3 out of 1,000 women developed tissue abnormalities For the population of women whose mothers did not take the drug DES during pregnancy, what is the estimate (to 1 decimal) of the number of women out of 1000 who would be expected to have tissue abnormalities? (Hint: remember that women whose mothers took the drug were twice as likely to develop tissue abnormalities.) d. 3 out of 1,000 women developed tissue abnormalities True or faise: Medical studies often use a relatively large sample (in this case, 3980) because disense occurrences can be rare and difmicuilt to observe when only solated populations are considered

Explanation / Answer

Solutionb:

sample proportion(took durg DES)=63/3980*1000=15.82915

ANSWER:15.8

Solutionc:

sample proportion (who did not take drug DES)=(3980-63)/3980*1000

=984.1709

=984.2(to one decimal)

ANSWER:984.2

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