A seven-year medical research study reported that 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. a. This study compared two populations. What were the populations?
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A seven-year medical research study reported that 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. a. This study compared two populations. What were the populations? b. Do you suppose the data were obtained in a survey or an experiment? c. For the population of women whose mothers took the drug DES during pregnancy, a sample of 3,980 women showed that 63 developed tissue abnormalities that might lead to cancer. Provide a descriptive statistic that could be used to estimate the number of women out of 1,000 in this population who have tissue abnormalities. d. For the population of women whose mothers did not take the drug DES during pregnancy, what is the estimate of the number of women out of 1,000 who would be expected to have tissue abnormalities? e. Medical studies often use a relatively large sample (in this case, 3,980 ). Why?
The North Carolina State Center for Health Statistics data shows that 20 percent of mothers admitted to smoking one or more cigarettes per day during pregnancy. If a random sample of size ten is selected from this population, what is the probability that it will contain at least three mothers who admitted to smoking during pregnancy?
Sri K.
The data from the North Carolina State Center for Health Statistics show that 14 percent of mothers admitted to smoking one or more cigarettes per day during pregnancy. If a random sample of size 10 is selected from this population, what is the probability that it will contain exactly four mothers who admitted to smoking during pregnancy? What is the probability that it will contain no more than 2 mothers who admitted to smoking during pregnancy? What is the probability that it will contain more than 2 mothers who admitted to smoking during pregnancy?
Adi S.
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