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# Consider the probability distribution below x. F(x) 10.2 20 .3 30 .4 40 .1 the variance of x equals a. 85 b 93.33 c 84 d.

Consider the probability distribution below

x. F(x)

10. .2

20 .3

30 .4

40 .1

the variance of x equals

a. 85

b 93.33

c 84

d. 9.165

• I get the first part and second part. When I get to 100 times zero point two I get lost
• rekennaclay
• Oct 01, 2018 at 8:13pm
• There we are finding the variance, square each x value then multiply by the respective probabilities,
• Dinoco12
• Oct 01, 2018 at 8:27pm

The solution is... View the full answer

• Can you break this down for me more please. I didn't get the right answer when I tried it
• rekennaclay
• Oct 01, 2018 at 7:33pm
• I got 904.7
• rekennaclay
• Oct 01, 2018 at 7:33pm
• please let me know which part because it just need to put in calculator
• SumitK21
• Oct 01, 2018 at 7:36pm
• 10^2 *0.2 =20 and 20^2*0.3 =120 and 30^2*0.4=360 and 40^2*0.1=160 and 24^2 =576
• SumitK21
• Oct 01, 2018 at 7:38pm
• [20 + 120 + 360 + 160 ] - 576= 660 - 576 = 84
• SumitK21
• Oct 01, 2018 at 7:38pm
• The second part I put it in the calculator and ended with a different answer. The variance part.
• rekennaclay
• Oct 01, 2018 at 7:43pm
• i have broken every number, please check and let me know
• SumitK21
• Oct 01, 2018 at 7:48pm
• Okay thanks
• rekennaclay
• Oct 01, 2018 at 7:49pm

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