A computer disk drive manufacturer claims that the average time to failure for its hard drives is 14,400 hours. You work for a consumer group that has decided to examine this claim. Technicians ran 16 drives continuously for three years. The time to failure (in hours) are given in the table below. You want to test the manufacturer's claim.Time Until Failure (Hours)330 620 1870 2410 4620 6396 7822 81028309 12,882 14,419 16.092 18,384 20,916 23,812 25,814What level of measurement does the variable possess?
Question
A computer disk drive manufacturer claims that the average time to failure for its hard drives is 14,400 hours. You work for a consumer group that has decided to examine this claim. Technicians ran 16 drives continuously for three years. The time to failure (in hours) are given in the table below. You want to test the manufacturer's claim.Time Until Failure (Hours)330 620 1870 2410 4620 6396 7822 81028309 12,882 14,419 16.092 18,384 20,916 23,812 25,814What level of measurement does the variable possess?
Solution
The variable in this case, which is "Time Until Failure (Hours)", possesses an Interval level of measurement. This is because the data is numerical and the differences between the values are meaningful and can be ordered. Additionally, there is a true zero point which indicates the absence of the characteristic being measured, in this case, the absence of failure.
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