Quality control is an important issue at ACME Company, which manufactures light bulbs. To test the...
Quality control is an important issue at ACME Company, which
manufactures light bulbs. To test the life-hours of their light
bulbs, they randomly sampled nine light bulbs and measured how many
hours they lasted: 378, 361, 350, 375, 200, 391, 375, 368,
321.
What is the mean?
Homework Answers
Mean = (Sum of observations) / (Total number of observations)
Here,
Sum of observations = 378 + 361 + 350 + 375 + 200 + 391 + 375 + 368 + 321 = 3119
Total number of observations = 9
Therefore,
Mean = 3119/9 = 346.56
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