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A tire producer would like to estimate the average tread life of their brand of automobile tire. Fifty customers who have purchased this tire are
A tire producer would like to estimate the average tread life of their brand of automobile tire. Fifty customers who have purchased this tire are sampled and asked about the tread life of their tires. What is the tire producer using to estimate the average tread life?
A.
qualitative data.
B.
inferential statistics.
C.
secondary data.
D.
descriptive statistics
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