Questions:
Drinking and Pregnancy. A simple random sample of 1,252 pregnant women under the age of 25 includes 13 who were drinking alcohol during their pregnancy. A simple random sample of 2,029 pregnant women of age 25 and over includes 37 who were drinking alcohol during their pregnancy. (The data are based on results from the U.S. National Center for Health Statistics.) Use a 0.05 significance level to test the claim that the age category (under 25 and 25 or over) is independent of drinking during pregnancy.
Q. State the null hypothesis
Age category is independent of drinking during pregnancy
Age category is not independent of drinking during pregnancy
Other:
Q. State the alternative hypothesis.
Age category is independent of drinking during pregnancy.
Age category is not independent of drinking during pregnancy.
Other:
Q. Find the value of the Chi-square test statistic:
0.181
1.181
2.181
3.181
Q. Use the given significance level to find the Chi-square critical value
2.07
2.71
3.84
5.02
Q. Hypothesis testing result
Reject the null hypothesis
Do not reject the null hypothesis
Q. State the conclusion that addresses the original claim.
There is enough evidence to reject the independence of the age category and drinking in pregnancy.
There is not enough evidence to reject the independence of the age category and drinking in pregnancy.