My daughter wears a size 2 jacket. She went to her favorite clothing store and found that the mean size of the store's stock of jackets is a size 10 with a standard deviation of 4 sizes. What is her z-score in the distribution of the store's jackets?

Question

Quizplus · Accepted Answer

The z-score is calculated by subtracting the mean from the value in question and then dividing by the standard deviation. For the daughter's jacket size, this is (2 - 10) / 4 = -8 / 4 = -2.

My Daughter Wears a Size 2 Jacket