Z-scores & Decision Making

Suppose you earned 100 points on an exam. Under which of the following conditions did you earn the best grade? Please explain this to me.

When:
a. ? = 80 and Ï? = 10
b. ? = 80 and Ï? = 5
c. ? = 105 and Ï? = 10
d. ? = 105 and Ï? = 5

Please see the attachment.

Z scores
Suppose you earned 100 points on an exam. Under which of the following conditions did you earn the best grade? Please explain this to me.

When:
a. µ = 80 and σ = 10
b. µ = 80 and σ = 5
c. µ = 105 and σ = 10
d. µ = 105 and σ = 5
Answer
Let us find out the …

The solution provides step by step method for the calculation of probability using the Z score. Formula for the calculation and Interpretations of the results are also included.