Question

The weights of boxes of candies produced in a factory are normally distributed with a mean weight of 16 oz and a standard deviation of 1 oz. What is the weight of a box of candies with a z-score of 2?



16 oz

18 oz

20 oz

22 oz

Answer 1

The z-score formula is:
Z=X−μ over σ


Where
Z = z-score
X = weight of a box
μ = mean
σ = standard deviation

Essentially, the problem gives you Z , μ and σ . Substitute those values in the z-score formula and you just need to find X .