76.9k views
1 vote
the length of an instant message conversation is normally distributed with a mean of 5 minutes and a standard deviation of 0.7 minutes. what is the probability that a conversation lasts longer than 6 minutes?

User Gfrizzle
by
8.6k points

2 Answers

6 votes

Answer: 0.922

Explanation:

6-5/0.7= 10/7 or 1.42

Standard normal distribution= .92220

User Hentold
by
8.8k points
0 votes
We have mean of 5 and a standard deviation of 0.7 minutes
P(Z > 6 - 5/0.7) = P(Z > 10/7) = 1 - P(Z < 10/7) = 1 - 0.92344 = 0.07656
User Zapador
by
7.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories