Essay
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. What is the test statistic?
Correct Answer:
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t = 3.9061
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Correct Answer:
Verified
Explanation: For a ...
View Answer
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