QUESTION	ANSWER
An effective vaccine would reduce the proportion of exposed persons contracting a disease. A pharmaceutical company wants to test the effectiveness of a new vaccine in preventing a certain disease. It is expected that 40% of unvaccinated exposed people will contract the disease. A group of 48exposed persons volunteered to be vaccinated. Later, two of the volunteers contracted the disease. Test H0: 0.40 (vaccine ineffective) at= 0.01
Test size C battery mean life is at least 25 hours.
Given weights of 31, 29, 26,33, 40, 28, 30, and 25, at =0.05 test that the population mean is 35.
Testing that a gasoline additive increases mileage, we compute mpg with additive minus mpg without additive for each car. If the mean of the differences is positive enough, action will be required to implement the additive
Run times (msec) of a new phone app developed by Got Your GP and established competitor
ANSWER CHOICES
A.
1-tailed test of proportion with negative critical value
B.
2-tailed test of mean with both negative and positive critical values
C.
1-tailed test of mean with negative critical values
D.
1-tailed test of paired-data with positive critical value
E.
2-tailed test of means of 2independent populations