Repair calls. Find the mean and standard deviation of the number of repair calls the appliance shop in Exercise 17 should expect during an 8-hour day. Exercise 17: Repairs. The probability model below...

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Repair calls. Find the mean and standard deviation of the number of repair calls the appliance shop in Exercise 17 should expect during an 8-hour day.

Exercise 17:

Repairs. The probability model below describes the number of repair calls that an appliance repair shop may receive during an hour.

a) How many calls should the shop expect per hour?

b) What is the standard deviation?

Answered Same DayDec 25, 2021

Answer To: Repair calls. Find the mean and standard deviation of the number of repair calls the appliance shop...

David answered on Dec 25 2021

119 Votes

transtutors.com/questions/-1725995.htm
in
a)
Following is the scatter plot
5 10 15 20 25 30
5
10
15
x
y
b)
Scatter diagram shows a weak upward (positive) relationship.
c)
x y (x − x̄)2 (y − ȳ)2 (x − x̄)(y − ȳ)
6 6 100 16 40
11 9 25 1 5
15 6 1 16 4
21 17 25 49 35
27 12 121 4 22∑
xi =
∑
yi = SSxx SSyy SSxy
80 50 272 86 106
x = 805 y =
50
5
=16 =10
From given...

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Repair calls. Find the mean and standard deviation of the number of repair calls the appliance shop in Exercise 17 should expect during an 8-hour day. Exercise 17: Repairs. The probability model below...

Answer To: Repair calls. Find the mean and standard deviation of the number of repair calls the appliance shop...

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