Calculate Z-Score
The grades on a statistics test at GW University are normally distributed with μ=55 and σ=12. George scored 65 on the exam. What is the z-score for George’s exam grade?
1) 89
2) 0.83
3) 0.89
4) 1.83
The heights of the statisticians working on the Large Hadron Collider project seems to be normally distributed with μ=68 inches and σ=5 inches. Dr. Numbercrackers’ height is 61 inches. What is the z-score corresponding to his height?
1) 1.4
2) -2.15
3) -1.4
4) -1.5
A Bureau on Economic Development conducted a survey of families residing in a small town of Gugelshnackel. The survey revealed that the average family income is $45,000 and σ=$10,538. The Holmes family income is $72,000. Choose a corresponding z-score:
1) 0.72
2) -0.72
3) 1.1
4) 2.56
