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Stats: Probability that two random values differ by a certain amount
Hullo,
I'm stumped on a stats question, and the holidays have begun here in Scotland so I can't ask my stats teacher, any help is much appericiaited:
The heights of girls in a certain age group are normally distributed with mean 150 cm and SD of 3cm. Calculate the probability that two randomly selected girls differ in height by at least 4cm.
Here's a normal distribution table:
http://www.math.unb.ca/~knight/utility/NormTble.htm
If anyone has any idea of how to do, it'd be a grea help.
Thanks!
I'm stumped on a stats question, and the holidays have begun here in Scotland so I can't ask my stats teacher, any help is much appericiaited:
The heights of girls in a certain age group are normally distributed with mean 150 cm and SD of 3cm. Calculate the probability that two randomly selected girls differ in height by at least 4cm.
Here's a normal distribution table:
http://www.math.unb.ca/~knight/utility/NormTble.htm
If anyone has any idea of how to do, it'd be a grea help.
Thanks!
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