Question

3) (10 pts ]Bayou Cin Bolts distributes bolts with lengths that are normally distributed with a mean of 4 inches and a standard deviation of 0.007 inches. About 68 % of all bolts manufactured and distributed will be between what lengths? What percentage of bolts will be between 3.993 inches and 4.014 inches?

Answer 1

The mean of the data, µ=4 in.

The standard deviation, σ=0.07 in.

According to empirical rule, 68% of observations is within first standard deviation