According to a study on the effects of smoking by pregnant women on rates of asthma in their children, for expectant mothers who smoke 20 cigarettes per day, 22.2% of their children developed asthma by the age of two in the US. A biology professor at a university would like to test if the percentage is lower in another country. She randomly selects 336 women who only deliver one child and smoke 20 cigarettes per day during pregnancy in that country and finds that 67 of the children developed asthma by the age of two. In this hypothesis test,

the test statistic, z =

and the p-value =