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Title: The following data were obtained from a survey of college students. The variable... Post by: Stevbo on Jul 5, 2016 The following data were obtained from a survey of college students. The variable X represents the number of nonassigned books read during the past six months.
x 0 1 2 3 4 5 6 P (X=x) 0.55 0.15 0.10 0.10 0.04 0.03 0.03 What is the variance of X? Place your answer, rounded to two decimal places in the blank. For example, 4.56 would be a legitimate entry. Bio_Man, any advice on this one? Title: Re: The following data were obtained from a survey of college students. The variable... Post by: bolbol on Oct 19, 2017 Multiply each x value by its corresponding P(X = x) value
0*0.55 = 0 1*0.15 = 0.15 2*0.10 = 0.20 3*0.10 = 0.30 4*0.04 = 0.16 5*0.03 = 0.15 6*0.03 = 0.18 Now add up the products: 0+0.15+0.20+0.30+0.16+0.15+0.18 = 1.14 |