In a survey of 703 randomly selected workers, 15.93% got their jobs through newspaper ads. Consider a hypothesis test that uses a 0.05 significance level to test the claim that less than 20% of workers get their jobs through newspaper ads.

What is the test statistic?

What is the critical value?

What is the P-value?

What is the conclusion?

Bases on the preceding results, can we conclude that 15.93% is significantly less than 20% for all such hypothesis tests?

Question #2

The Genetics and IVF Institute conducted a clinical trial of the YSORT method designed to increase the probability of conceiving a boy. 51 babies were born to parents using the YSORT method, and 39 of them were boys. Use the sample data with a 0.01 significance level to test the claim that with this method, the probability of a baby being a boy is greater than 0.5 Does the method appear to work?

Thanks for your help.