Question

when establishing the confidence interval for the average weight of a cereal box, assume that the population standard deviation is known to be 2 ounces and is normally distributed. based on a sample, the average weight of a sample of 20 boxes is 16 ounces. the appropriate test statistic to use is .

Answer 1

T-statistic

Explanation:

As the sample size is less than 30, the t-statistic is the more appropriate test statistic. If it were greater than 30, then the t-statistic distribution and normal distribution would be indistinguishable, making the z-statistic a more preferable choice.