The average amount of time spent waiting in line at the grocery store is normally distributed with a mean of 3.9 minutes and a standard deviation of .9 minutes. If I take a sample of the next 20 people who wait in line at the grocery store find the probability the mean wait time for this group of 20 people is more than 4 minutes?

The average amount of time spent waiting in line at the grocery store is normally distributed with a mean of 3.9 minutes and a standard deviation of .9 minutes. If I take a sample of the next 20 people who wait in line at the grocery store find the probability the mean wait time for this group of 20 people is more than 4 minutes?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

I have attached the question in the image upload below. Please refer to the attachments for the question details. Please read the questions carefully and provide correct answers as well as the solutions.
solve;
Solve for x. 25x - 17 = 8 X =
Solve for x
Solve for x. 2* * 6 = 3×-1 3D3
Solve for X. X = -1 5 3 -9 -6 8 = 4X-3 5 -1 9 9 6 5
Fill in the P (X=x) values to give a legitimate probability distribution for the discrete random variable X, whose possible values are -5, 1, 4, 5, and 6. Value x of X P ( X = x) -5 0.12 1 E 4 5 6 X e 0.22 0 0.25 ?
A third of number y equals half of 100. nimbery =
Solve for x in calculation ready form 9x=8
If 7root x = 2401. solve for x