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Newborn seal pups have lengths that follow a normal distribution with mean 0.749 meters and standard...

Newborn seal pups have lengths that follow a normal distribution with mean 0.749 meters and standard deviation 0.030 meters. The first quartile of seal pup lengths (in meters) is: (A) 0.742 (B) 0.729 (C) 0.769 (D) 0.757

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Answer #1

First quartile is equal to the 25-th percentile.

First, we need to find the z-score associated to this percentile.We need to find the value zp : z-score that solves the following equation below.

it is solved either by looking at a standard normal distribution table .

answer : B) 0.729

PL?☺️

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