SOLUTION: This problem is giving me fits, because of the word "inclusive." I believe the set up for the problem is P(14<= u <= 18) with Sigma =4, N=25 and a mean of 16. Restaurant custom

Question 912104: This problem is giving me fits, because of the word "inclusive." I believe the set up for the problem is P(14<= u <= 18) with Sigma =4, N=25 and a mean of 16.
Restaurant customers spend a mean of 16 minutes in the restaurant with a standard diviation of 4 minutes. What is the probability that a random sample of 25 customers will yield a mean of between 14 and 18 minutes "inclusive."
with a standard normal distribution.
Please provide formula used,
I tried z formula solving for 14-16/ sigma divided by the square root of N and then 18-16/ sigma divided by the square root of N, and then got the z value from the table and subtracted, but I am not sure that is correct.
Thanks to all who may be able to help!
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
standard normal distribution.
P(t ≤ 2.5) - P(t ≤ -2.5)= .9938 -.0062
RELATED QUESTIONS
What is the correct expression for this word problem? I think it should be the product of (answered by ewatrrr)

I am stuck on this problem. I believe it is a Z formula, but cannot find the formula to... (answered by ewatrrr)

this problem is giving me a headache because i don't know one part of the equation.... (answered by scott8148,solver91311)

How do I solve the following equation? n + 2 / 5 = n - 14 My original... (answered by ankor@dixie-net.com)

Hi: I have this word problem that I'm uncertain how to set up to solve. If someone... (answered by ankor@dixie-net.com)

I'm trying to figure out the proper Order of Operation for this problem. I believe the... (answered by neal1351)

I NEED TO SET UP AN EQUATION FOR THIS WORD PROBLEM: THE SUM OF TWO NUMBERS IS 18. THREE... (answered by venugopalramana)

I need help with this word problem:My online HW is giving me one last try on this... (answered by Alan3354,ankor@dixie-net.com)

Write this ratio in simplest form: 1/10 / 1/4 First I must flip the second problem: (answered by ptaylor)