The proportion of crocodiles live between 17.5 and 20.5 years is 0.4068
What is an equation?
An equation is an expression that shows the relationship between two or more numbers and variables.
Z score is given by:
z = (raw score - mean) / standard deviation
Given a mean of 18 years and a standard deviation of 2.6 years.
For x = 17.5
z = (17.5 - 18) / 2.6 = -0.19
For x = 20.5
z = (20.5 - 18) / 2.6 = 0.96
P(-0.19 < z < 0.96) = P(z < 0.96) - P(z < -0.19) = 0.8315 - 0.4247 = 0.4068
The proportion of crocodiles live between 17.5 and 20.5 years is 0.4068
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