STAT 201 Week 6_Power Point

STAT 201 Week 6_Power Point - distributions are shown as...

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Click to edit Master subtitle style 9/26/11 STAT 201 Recitation Week 6
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9/26/11 Exercise 5-2, pp.196 Two numbers are randomly drawn  without replacement from a list of  five. If the five numbers are  2,2,4,6,8, what is the probability  distribution of the sum of the two  numbers selected? 
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9/26/11 The random variable, x (total, sum of the two numbers  selected) , and the frequency and relative frequency 
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Unformatted text preview: distributions are shown as follows : x P( x) x P(x) 4 0.1 6 0.2 8 0.2 10 0.3 12 0.1 14 0.1 9/26/11 Expected value of x =40.1 +60.2 +80.2 +100.3 +120.1 +140.1 =8.8 Variance of x =(4-8.8)20.1 x P(x) x*P(x) 4 0.1 0.4 6 0.2 1.2 8 0.2 1.6 10 0.3 3 12 0.1 1.2 14 0.1 1.4 E(x)= 8.8 x P(x) [x-E(x)]2*P(x) 4 0.1 2.304 6 0.2 1.568 8 0.2 0.128 10 0.3 0.432 12 0.1 1.024 14 0.1 2.704 V(x)=...
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STAT 201 Week 6_Power Point - distributions are shown as...

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