The lengths of salamanders have a normal distribution with mean 15cm, and standard deviation 2cm. What is the probability a salamander has length less than 13cm?

(provide your answer as a decimal)

0.1587

Step-by-step explanation:

So we were given;

x = 13

Mean = 15

Standard deviation = 2

We will be using the Z score formula

Z = (x - mean) / standard deviation

So z = ( 13 - 15 ) / 2

z = - 2/2

z = -1

So we check for -1 in the z table

z = 0.1587

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step-by-step explanation: