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Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 22,100 miles. The fleet owner purchased 18 sets and found that the sample average life was 23,400 miles; the sample standard deviation was 1,412 miles. To decide if the sample data support the company records that the spark plugs average is LESS THAN 22,100 miles, state your decision in terms of the 6 steps. Use a 0.025 level of significance. 1, define h0 and h1 2. define Alpha 3. which Test, T or Z?

Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 22,100 miles. The fleet owner purchased 18 sets and found that the sample average life was 23,400 miles; the sample standard deviation was 1,412 miles. To decide if the sample data support the company records that the spark plugs average is LESS THAN 22,100 miles, state your decision in terms of the 6 steps. Use a 0.025 level of significance. 1, define h0 and h1 2. define Alpha 3. which Test, T or Z?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 22,100 miles. The fleet owner purchased 18 sets and found that the sample average life was 23,400 miles; the sample standard deviation was 1,412 miles. To decide if the sample data support the company records that the spark plugs average is LESS THAN 22,100 miles, state your decision in terms of the 6 steps. Use a 0.025 level of significance. 1, define h0 and h1 2. define Alpha 3. which Test, T or Z? 4. decision role, with the picture if necessary. 5. calculate sample test and reach your decision, reject h0 or fail to reject h0 6. conclusion based on the problem.
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