A new breathing technique is tested to see what effect this has on lung capacity. In a sample of 22 people who used this new breathing technique showed a mean difference in their lung capacity of .2 liters with a standard deviation of 2.1 liters.

a) At the .05 level did the new breathing technique have any effect on lung capacity? (p-value = .66)

b) Interpret the p-value obtained

c) Based on the answer for a) what was the reason for the change in lung capacity?

5. The number of times a breed of dog wags its tail in one minute is measured as they see their owner pull in the driveway as they come home from work. For a sample of 99 Labradors the average number of tail wags per minute was 120 with a standard deviation of 15. For a sample of 80 Beagles the average number of tail wags was 87 with a standard deviation of 18.

a) At the .05 level was there a difference in the average number of tail wags between the breeds? (p- value = 0)

b) Interpret the p-value obtained

c) True or False: Natural Variability is the reason for the difference in the avg. number of tail wags