Question

? 2 3 4 5 6 7 8 9 10 11 12 13 14 15 > Question 1 of 15 (1 point) Attempt 1 of 1 | View question in a popup 039m 54s Remaining 5.2 Section Pizza Deliveries A pizza shop owner determines the number of pizzas that are delivered each day. Number of deliveries X 36 37 0.2 38 0.3 Probability P(x) 39 0.3 40 0.1 0.1 Send data to Excel Part 1 of 3 Find the mean Doundour Curta ondocimalniaco a nended Next Part Submit Assignmen © 2020 McGraw-Hill Education. All Rights Reserved Terms of Use Prive Type here to search

can you find the standard deviation and variance please

Answer 1

the necessary calculation table is :-

x	P(x)	x*P(x)	x2*P(x)
36	0.1	3.6	129.6
37	0.2	7.4	273.8
38	0.3	11.4	433.2
39	0.3	11.7	456.3
40	0.1	4	160
		sum=38.1	sum=1452.9

$mean = \sum x*P(x)=\mathbf{38.1}$

$\mathbf{variance}=\sum x^2*P(x)-mean^2=(1452.9-38.1^2)=\mathbf{1.29}$

$\mathbf{standard\ deviation}=\sqrt{variance}=\sqrt{1.29}\approx\mathbf{1.14}$

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