SOLUTION: Hi! Please help me out with this question! In a certain doctors' office the waiting time is normally distributed with a mean of 25 minutes and a standard deviation of 5.3 minut

Algebra ->  Probability-and-statistics -> SOLUTION: Hi! Please help me out with this question! In a certain doctors' office the waiting time is normally distributed with a mean of 25 minutes and a standard deviation of 5.3 minut      Log On


   

Question 1179010: Hi! Please help me out with this question!
In a certain doctors' office the waiting time is normally distributed with a mean of 25 minutes and a standard deviation of 5.3 minutes. Laura just walked into the doctors' office. Find the probability that she will have to wait longer than 18 minutes before seeing the doctor.
Thank you so much!
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
Normal distribution: with µ = 25 and σ = 5.3
 P(x > 18)
Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus
 P(x > 18) = (18, 9999, 25,5.3) = .9067

Wish You the Best in your Studies.