SOLUTION: Suppose the scores on a chemistry test were normally distributed with a mean of 78 and a standard deviation of 10. If a student who completed the test is chosen at random Find the

Question 1176345: Suppose the scores on a chemistry test were normally distributed with a mean of 78 and a standard deviation of 10. If a student who completed the test is chosen at random Find the probability that the student earned fewer than 75 points .
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!


Hi
Normal Distribution:    μ = 78   σ = 10
Using TI or similarly like an inexpensive Casio fx-115 ES plus 
p(x ≤ 75) = normalcdf (-9999, 75, 78, 10) = .3821    |-9999 a placeholder only

Important to feel comfortable using Your calculator
and know what is permissible for in-class testing.
Wish You the Best in your Studies.

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