SOLUTION: What proportion of people score between X = 70 and X = 120 on a normal ditribution ( mean = 100, Standard deviation = 15)" Transfor to Z score Draw Identify

Question 577899: What proportion of people score between X = 70 and X = 120 on a normal ditribution ( mean = 100, Standard deviation = 15)"
Transfor to Z score
Draw Identify
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
What proportion of people score between X = 70 and X = 120 on a normal ditribution ( mean = 100, Standard deviation = 15)"
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z(70) = (70-100)/15 = -2
z(120) = (120-100)/15 = 4/3
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P(70 < x < 120)
= P(-2 < z < 4/3)
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Cheers,
Stan H.
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