Question

The Yummy Snack Pack of potato chips is advertised to weigh 4.2 oz. The weights are normally distributed with a mean of 4.2 oz. and a standard deviation of 0.25 oz. Twenty-five (25) bags of these potato chips are randomly selected. 26.) Find the mean of the sample distribution. (a) 0.25 (b.) 25 (c) 0.168 (d.) 4.2 (e.) None of these 27.) Find the variance of the sample distribution. (a) 0.7056 (b.) 0.0625 (c) 16.8 (d.) 25 (e.) None of these 28.) Find the standard deviation of the sample distribution. (a) 0.25 (b.) 4.099 (c) 0.84 (d.) 0.7056 (e.) None of these

Answer 1

Solution :

Given that ,

mean = = 4.2

standard deviation = = 0.25

n = 25

mean of the sample distribution.

=   = 4.2

standard deviation of the sample distribution

= / n = 0.25/ 25 = 0.05