Question

* * * {MEDAL} * * *
The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of .5 minutes. What is the probability that a conversation lasts longer than 3 minutes?

Answer 1

options:

0.043351

0.063748

0.02275

0.095424

Answer 2

The Answer is C, 0.02275

Answer 3

Thx, are you sure?

Answer 4

area between 2 standard deviation is 0.9545
we have to find (1-0.9545)/2, which equals 0.02275

Answer 5

Thanks

Answer 6

Yw, thanks for your help:)