The grades on a history midterm at Almond are roughly symmetric with y = 85 and o = 2.0.

Michael scored 86 on the exam.

Find the z-score for Michael's exam grade. Round to two decimal places.

The z-score for Michael's exam grade is 0.50

Step-by-step explanation:

Data

mean, μ = 85 standard deviation, σ = 2.0 Michael's exam grade is the value of interest, x = 86

From definition, z-score is computed as follows:

Z = (x - μ) / σ

Z = (86 - 85) / 2.0

Z = 0.50