Answered

The lifespan of gorillas in a particular zoo are normally distributed.The average gorilla lives 20.8 years ;the standard deviation is 3.1 years

Answer :

fichoh

Complete question :

The lifespans of gorillas in a particular zoo are normally distributed. The average gorilla lives 20.8 years; the

standard deviation is 3.1 years.

Use the empirical rule (68 – 95 - 99.7%) to estimate the probability of a gorilla living less than 23.9 years.

Answer:

84%

Step-by-step explanation:

Given :

Mean, m = 20.8

Standard deviation, s = 3.1 ; x = 23.9

The Zscore = (x - mean) / standard deviation

P(x < 23.9) = (23.9 - 20.8) / 3.1 = 1

P(x < 23.9) = 1

P(Z < 1) = 0.84134

0.84134 * 100% = 84.13%

= 84%

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