Chick fil a is planning to open a big location onthat each customer on average spends 35 minutes with standard deviation of 15 minutes for diningin and it approximately follows normal distribution. If in a certain day 25 customers arrive:Lust campus. Based on their experience they knowа.What is the mean and variance of total time customers spend in store?b.what is the probability of the total service time would be between 825 to 900minutes?On average, it takes 400 days that aLust one-card wears out and printing fades away. In a randomsample of 1600 one-cards:Find the expected value and variance of the sample mean.а.b.what is the probability that the average wear out time of the selected cards will begreater than 380 days?

Answered: Chick fil a is planning to open a big…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Chick fil a is planning to open a big location on
that each customer on average spends 35 minutes with standard deviation of 15 minutes for dining
in and it approximately follows normal distribution. If in a certain day 25 customers arrive:
Lust campus. Based on their experience they know
а.
What is the mean and variance of total time customers spend in store?
b.
what is the probability of the total service time would be between 825 to 900
minutes?
On average, it takes 400 days that a
Lust one-card wears out and printing fades away. In a random
sample of 1600 one-cards:
Find the expected value and variance of the sample mean.
а.
b.
what is the probability that the average wear out time of the selected cards will be
greater than 380 days?

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For variable X,

$Z = \frac{X - μ}{σ}, where μ = population mean σ = population standard deviation$

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