# Question

To test whether a golf ball of brand A can be hit a greater distance off the tee than a golf ball of brand B, each of 17 golfers hit a ball of each brand, 8 hitting ball A before ball B and 9 hitting ball B before ball A. The results in yards are as follows:

Assume that the differences of the paired A distance and B distance are approximately normally distributed, and test the null hypothesis H0: μD = 0 against the alternative hypothesis H1: μD > 0, using a paired t test with the 17 differences. Let α = 0.05.

Assume that the differences of the paired A distance and B distance are approximately normally distributed, and test the null hypothesis H0: μD = 0 against the alternative hypothesis H1: μD > 0, using a paired t test with the 17 differences. Let α = 0.05.

## Answer to relevant Questions

A researcher claims that she can reduce the variance of N(μ,100) by a new manufacturing process. If S2 is the variance of a random sample of size n from this new distribution, she tests H0: σ2 = 100 against H1: σ2 < 100 ...Plants convert carbon dioxide (CO2) in the atmosphere, along with water and energy from sunlight, into the energy they need for growth and reproduction. Experiments were performed under normal atmospheric air conditions and ...Let X and Y denote the tarsus lengths of male and female grackles, respectively. Assume that X is N(μX, σ2x) and Y is N(μY, σ2Y). Given that n = 25, x = 33.80, s2 x = 4.88, m = 29, y = 31.66, and s2y = 5.81, test the ...Let p equal the proportion of drivers who use a seat belt in a state that does not have a mandatory seat belt law. It was claimed that p = 0.14. An advertising campaign was conducted to increase this proportion. Two months ...A pharmaceutical company is interested in testing the effect of humidity on the weight of pills that are sold in aluminum packaging. Let X and Y denote the respective weights of pills and their packaging (in grams), when the ...Post your question

0