The weight of a product is measured in pounds. A sample of 50 units is taken from a recent production. The sample yielded ![The weight of a product is measured in pounds. A sample of 50 units is taken from a recent production. The sample yielded = 75 lb, and we know that σ<sup>2</sup> = 100 lb. Calculate a 99 percent confidence interval for μ. A) [71.36, 78.64] B) [74.25, 75.75] C) [38.58, 111.42] D) [71.71, 78.29]](https://d2lvgg3v3hfg70.cloudfront.net/TB7056/11ead627_0a88_6194_93a1_0ddc0706cfa7_TB7056_11.jpg)
= 75 lb, and we know that σ2 = 100 lb. Calculate a 99 percent confidence interval for μ.
A) [71.36, 78.64]
B) [74.25, 75.75]
C) [38.58, 111.42]
D) [71.71, 78.29]
Correct Answer:
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