A restaurant records the amount of time customers wait for a table on Saturday evenings. The table to the right lists the frequency of wait times for the last100customers. Complete parts a) andb). Number of Minutes per Customer Frequency a. The approximate average wait time per customer is ____minutes. 0 to under 107b) Calculate the approximate variance and standard deviation of the wait time per customer. 10 to under 2019 20 to under 3010 30 to under 40 18 40 to under 50 30 50 to under 6016

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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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A restaurant records the amount of time customers wait for a table on Saturday evenings. The table to the right lists the frequency of wait times for the last 100 customers. Complete parts a) and b).	Number of Minutes per Customer	Frequency
a. The approximate average wait time per customer is ____ minutes.	0 to under 10	7
b) Calculate the approximate variance and standard deviation of the wait time per customer.	10 to under 20	19
	20 to under 30	10
	30 to under 40	18
	40 to under 50	30
	50 to under 60	16

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