Question

If you were to draw samples of size 31 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample?

Answer 1

The range in which we would expect to find the middle 68% of most averages for the lengths of pregnancies in a sample of size 31 is the mean +/- one standard deviation.

Step-by-step explanation:

The question is asking about the range in which we would expect to find the middle 68% of most averages for the lengths of pregnancies in a sample of size 31. To solve this, we can use the concept of confidence intervals. The middle 68% of averages falls within one standard deviation above and below the mean.

In this case, since the sample size is 31, we can use the formula: standard deviation of sample mean = population standard deviation / square root of sample size. So, the range in which we would expect to find the middle 68% of most averages for the lengths of pregnancies in a sample of size 31 would be the mean +/- one standard deviation.