For a distribution with a mean of 80 and standard deviation of 10, at least what percentage of values will fall between 60 and 100?

Question

Jayleen Frazier

Mathematics

12 May, 15:05

For a distribution with a mean of 80 and standard deviation of 10, at least what percentage of values will fall between 60 and 100?

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Answers (1)

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Bobbie · Answer 1

Find the Z score of both:

Z = (X-μ) / σ

Z₁ = (60-80) / 10 = = > - 2

& Z₂ = (100-80) / 10==>+2

& you will find on the Z score tables that the probability to be between

60 & 100 is 0.95 or 95%