The weight of a product is measured in pounds. a sample of 50 units is taken from a recent production. the sample yielded x¯¯¯ = 75 lb, and we know that σ2 = 100 lb. calculate a 99 percent confidence interval for μ.

(71.36, 78.64)

Step-by-step explanation:

Given : Sample size : n= 50

Sample mean :

Variance :

Standard deviation :

Significance level :

Critical value :

The confidence interval for population mean is given by :-

Hence, the 99% confidence interval for population mean = (71.36, 78.64)

757764

step-by-step explanation:

de77737dd