The Student Room Group

How am I wrong?

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Question 7 d

I arranged the problem as
2*p(x-u < 1) >= 0.98

p(x-u<1) >= 0.49

But when I solve this I end up with n = 4.26, rather than 48.7.
Reply 1


Should be 2P(x-u < 1) - 1 >= 0.98.
Reply 2
Original post by Zacken
Should be 2P(x-u < 1) - 1 >= 0.98.


Ah yes of course. Thanks a lot!
Reply 3
Original post by Armpits
Ah yes of course. Thanks a lot!


No worries.

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