Question

A food snack manufacturer samples 7 bags of pretzels off the assembly line and weighs 19) their contents. If the sample mean is 15.7 oz. and the sample standard deviation is
0.40 oz., find the 95% confidence interval of the true mean.

A) 15.4 < μ < 16.0 B) 14.0 < μ < 17.4 C) 14.8 < μ < 16.6 D) 15.5 < μ < 15.9

Answer 1

Answer:-

Given that:-

A food snack manufacturer samples 7 bags of pretzels off the assembly line and weighs 19) their contents. If the sample mean is 15.7 oz. and the sample standard deviation is
0.40 oz., find the 95% confidence interval of the true mean.

Sample mean

Standard deviation

Sample size

The 95% confidence interval is given by :

t has n-1 = 7- 1 = 6 degrees of freedom

Since

A)