An investigator observes that women who drink more than 4 alcoholic drinks per d

Question

An investigator observes that women who drink more than 4 alcoholic drinks per day have a higher rate of pre-term pregnancy. In fact, the odds ratio is 6.47. This means that:

A. Women who drink excessively have 6.47% more preterm infants than women who do not.

B. The critical t-value to reject the null hypothesis is 6.47 3. The probability of a woman who drinks having a preterm birth is 6.47%

C. The odds of women who don't drink excessively of having a pre-term birth are 6.47% lower than those of women who do.

D. Women who drink have 6.47 times the odds of having a pre-term birth as women who do not drink

Explanation / Answer

Note that the odds is a ratio of probabilities. It is the ratio of probability success over probability of failure.

Here, success is having pre-term birth, so it is

OPTION D: Women who drink have 6.47 times the odds of having a pre-term birth as women who do not drink [ANSWER]

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