Question

Erythromycin is used to increase the risk of nausea during pregnancy. 30% of all pregnant women complain of nausea between weeks 24 and 28 of pregnancy. A study is conducted of 200 pregnant women who are taking erythromycin during pregnancy between the 24th and 28th week of pregnancy and 110 complain of nausea during that time period. determine the incidence of nausea is different among women taking erythromycin compared to typical pregnant women.

Answer 1

Given that population proportion P = 30%

n = 200 and x = 110

Sample proportion:

Hypothesis:

Test statistic,

Critical value = 1.96 at 5% level of significance.

p-value = 2 * P(z > 7.72) = 2 [1-p(z<7.72)] = 2 [ 1- 1] = 0.0000

Since calculated value is greater than critical value we reject null hypothesis and conclude that  the incidence of nausea is different among women taking erythromycin compared to typical pregnant women.