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Q1) Give the variance of following distribution?
x
p(x)
0
0.20
1
0.35
2
0.10
3
0.25
4
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
The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
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