The Professor's Response

Hello Professor
In the homework for section 14.4, why is number's 19 critical value negative, when it is a right tailed test?

  See the professor's answer below.

Professor McGukian

Hi Sheyla,

This large sample approach to the Sign Test modifies the procedure we learned throughout the course in a way that requires us to always perform a left-tailed test. This is because we are choosing Smin as our test stat, and we are testing to see if that minimum value is so small that we should reject the null hypothesis. 

This is the only procedure that will require us to ignore the inequality symbol in the alternative hypothesis.

Professor McGuckian

  Back to Ask the Professor