Explaining binomial model

Reference no: EM1315748

Q1) Give the variance of following distribution?

x	p(x)
0	0.20
1	0.35
2	0.10
3	0.25
4	0.10

i) 1.83

ii) 1.31

iii) 1.25

iv) 1.71

Q2) A researcher surveyed college students to study their opinion about proposed change in smoking rules. Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as

a) 30 students are not sufficient for a good sample

b) Students who strongly supported change and those who simply mildly supported change are counted same

c) There are 3 possible outcomes, not 2

d) Less than half of the students supported the change

Reference no: EM1315748

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