1. A high school counselor wants to examine whether the teenage pregnancy rate a

Question

1. A high school counselor wants to examine whether the teenage pregnancy rate at her school is different from the rate nationwide. She knows that the rate nationwide is 15 %. She randomly selects 80 female students from her high school. She finds that 9 out of 80 students are either pregnant now or have been pregnant previously.

a. What statistical test should be used to analyze the data?
b. Identify H0 and Ha for this study
c. Conduct the appropriate analysis
d. Should H0 be rejected? What should the researcher conclude?

Explanation / Answer

given this a.sample t test (can you z since 80 is fairly large) b.Ho: u=.15 ha: u == .15 c. t=(9/80-.15)/sqrt(.15*.85/80)=-.939 we can't reject the null. d. She should conclude that data does not suggest that her school is special.

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