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# Normal distribution Watch

1. "If X~N(4.1,4) what value of X will cut off a probability of 0.015 in each tail of the distribution?"

Not sure how to approach this?

THanks.
2. (Original post by boromir9111)
"If X~N(4.1,4) what value of X will cut off a probability of 0.015 in each tail of the distribution?"

Not sure how to approach this?

THanks.
Someone didn't do S1.

Do you have a table of values for the standard normal distribution.

If so you will see that P(Z<2.17)=0.015

This means that you want 2.17 x standard deviation above and below the mean.

So 4.1 + or - 2.17 x 2
3. (Original post by Get me off the £\?%!^@ computer)
Someone didn't do S1.

Do you have a table of values for the standard normal distribution.

If so you will see that P(Z<2.17)=0.015

This means that you want 2.17 x standard deviation above and below the mean.

So 4.1 + or - 2.17 x 2
Lol.....thanks for that

Oh, yeah, that makes sense....thanks mate, much appreciated!

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