The military has two different programs for training aircraft personnel. A government regulatory agency has been commissioned to evaluate any differences that may exist between the two programs. The agency administers standardized tests to randomly selected groups of students from the two programs. The results of the tests for the students in each of the programs are as follows Military Training Programs Program A Program B 11 50 55 X 85 87 9 a. Calculate a 99% confidence interval for the difference between the average scores of the two military programs. Interpret the interval. b. Can the agency conclude that there is a difference in the average test scores 001

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10. The military has two different programs for training aircraft personnel. A government
regulatory agency has been commissioned to evaluate any differences that may exist
between the two programs. The agency administers standardized tests to randomly
selected groups of students from the two programs. The results of the tests for the
students in each of the programs are as follows
Military Training Programs
Program A
Program B
11
50
55
New Battery
Old Battery
ki
85
87
a. Calculate a 99% confidence interval for the difference between the average
scores of the two military programs. Interpret the interval.
b. Can the agency conclude that there is a difference in the average test scores
of students in the two programs? Use a-0.01.
9
11. Tom Sealack, a supply clerk with the Navy, has been asked to determine if a new
battery that has been offered to the Navy (at a reduced price) has a shorter average
life than the battery they are currently using. He randomly selects batteries of each
type and allows them to run continuously so that he can measure the time until failure
for each battery. The results of the test are as follows.
n
35
35
Battery Life (Hours)
X
700
710
0
30
35
a. Do the data suggest at a=0.10 that the time until failure for the new battery.
is significantly less than the time until failure for the old battery?
b. Calculate the P-value for the test in a.
c. Based on the P-value, would the decision change at a-0.05?
Transcribed Image Text:10. The military has two different programs for training aircraft personnel. A government regulatory agency has been commissioned to evaluate any differences that may exist between the two programs. The agency administers standardized tests to randomly selected groups of students from the two programs. The results of the tests for the students in each of the programs are as follows Military Training Programs Program A Program B 11 50 55 New Battery Old Battery ki 85 87 a. Calculate a 99% confidence interval for the difference between the average scores of the two military programs. Interpret the interval. b. Can the agency conclude that there is a difference in the average test scores of students in the two programs? Use a-0.01. 9 11. Tom Sealack, a supply clerk with the Navy, has been asked to determine if a new battery that has been offered to the Navy (at a reduced price) has a shorter average life than the battery they are currently using. He randomly selects batteries of each type and allows them to run continuously so that he can measure the time until failure for each battery. The results of the test are as follows. n 35 35 Battery Life (Hours) X 700 710 0 30 35 a. Do the data suggest at a=0.10 that the time until failure for the new battery. is significantly less than the time until failure for the old battery? b. Calculate the P-value for the test in a. c. Based on the P-value, would the decision change at a-0.05?
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