SOLUTION: The reading test scores for the population is fifth graders is normally distributed with a mean of 55 and a standard deviation of 8. What percentage of the fifth graders score les

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Question 1197762: The reading test scores for the population is fifth graders is normally distributed with a mean of 55 and a standard deviation of 8.
What percentage of the fifth graders score less than 63?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi  
Normal Distribution: µ = 55 and σ = 8  ≤
Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus
Since this is a continuous function, we have P(x < 65) = P(x ≤ 65).

P(x ≤ 65) = normalcdf(-9999, 65, 8, 55) = .8944   |NOte: -9999 a placeholder)

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