The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of 0.5 min

Question

3 years ago

9

utes. What is the probability that a conversation lasts longer than 3 minutes?

2 answers:

fredd [130] · Answer 1 · 2022-08-28T11:27:41+03:00

7 0

On virtual school, the answer is 0.02275

Lapatulllka [165] · Answer 2 · 2022-08-28T10:20:16+03:00

5 0

Okay.consider A as the length of a text message conversation.
p(a>3)=1-p(b<3-2)/0.5)=1-0.97725= 0.02275.
hope i help.
good luck!