A container of car oil is supposed to contain 1000 milliliters of oil. A quality control manager wants to be sure
that the standard deviation of the oil containers is less than 20 milliliters. He randomly selects 10 cans of oil
with a mean of 997 milliliters and a standard deviation of 32 milliliters. Use these sample results to construct a
95% confidence interval for the true value of σ. Does this confidence interval suggest that the variation in the oil
containers is at an acceptable level?

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The Answer of A container of car oil is supposed to contain 1000 milliliters of oil. A quality control manager wants to be sure
that the standard deviation of the oil containers is less than 20 milliliters. He randomly selects 10 cans of oil
with a mean of 997 milliliters and a standard deviation of 32 milliliters. Use these sample results to construct a
95% confidence interval for the true value of σ. Does this confidence interval suggest that the variation in the oil
containers is at an acceptable level?

A Container of Car Oil Is Supposed to Contain 1000