I have a statistics question.....?

Question

Birth weights of ewes are normally distributed with a mean of 4.29 kg and a standard deviation of 0.13. What is the probability a randomly selected eye will have a weight between 4.5 and 4.8 kg?

Please help me by showing me step by step.....I don't understand it any other way.....thanks!

randomly selected EWE * sorry!

Answer 1

You may find the solution in any table of normal distribution.

Even easier is to find it on-line in this address:
http://www.math.csusb.edu/faculty/stanton/m262/normal_distribution/normal_distribution.html
Simply insert mean
mu=4.29,
standard deviation
sigma=0.13,
and boundaries of the requested interval
x1=4.5 and x2=4.8,
and get the result
P(x1 It is the upper „tail“ of the normal distribution (heaviest ewes).

If not clear what is the meanig of „normal distribution“ (or „Gaussian distribution“), „mean“ and „standard deviation“ google it in the Internet.

Simple vizualization is here: http://www.ms.uky.edu/%7Emai/java/stat/GaltonMachine.html

Interesting page is here: http://www.shodor.org/interactivate/activities/NormalDistribution/

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