On the midnight Shift the number of patients with head trouma in an emergency room has...

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On the midnight Shift the number of patients with head trouma in an emergency room has the probability distidation shown belo

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Answer 1

Answer #1

a)

x	f(x)	xP(x)	x²P(x)
0	0.0500	0.0000	0.0000
1	0.3400	0.3400	0.3400
2	0.2600	0.5200	1.0400
3	0.2000	0.6000	1.8000
4	0.1000	0.4000	1.6000
5	0.0500	0.2500	1.2500
	total	2.1100	6.0300

	E(x) =μ=	ΣxP(x) =	2.1100
	E(x²) =	Σx²P(x) =	6.0300
	Var(x)=σ² =	E(x²)-(E(x))²=	1.5779
	std deviation=	σ= √σ² =	1.2561

mean =2.11

standard deviation =1.256

option A) skewed to the right

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Answer 2

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