Question 527162
Suppose you earned 100 points on an exam. Under which of the following conditions did you earn the best grade?
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
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Procedure:
find the z-value of 100 for each of the 4 conditions
using z = (x-u)/sigma
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Whichever z value is greatest tells you the condition for the best grade.
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cheers,
Stan H.