00:01
Rates of infant mortality, birth defect, and premature labor are high for babies with low birth weights.
00:06
There are many factors that contribute to low birth rate.
00:08
But in this activity, we're going to use data from a random sample of women who participated in a study at bay state medical center in springfield, massachusetts in 1986.
00:18
So in this study, we had women with a history of premature labor, so i'm going to label that pl, and rl for regular labor.
00:27
In the premature labor group, there were 30 women, and they had a, p hat of 0 .6.
00:37
There were 159 in the regular labor group and they had a p hat of 0 .26.
00:43
We now investigate the following research question.
00:46
Do the data provide evidence that the proportion of babies born with low birth weight is higher for women with a history of premature labor? this question is answered with a hypothesis test and we're going to use a 1 % level of significance.
00:58
So question one, is this study observational or experimental? i would say this is observational.
01:08
Question one.
01:09
Question two, before analyzing the data, use your own experience and intuition to predict what the data will show.
01:16
Looking at the difference in those p -hats, my intuition says that the proportion of babies with low birth weight is higher for women with a history of premature labor...