Answer:
a)
Given,
p = 0.1
consider,
np(1-p) >= 10
n(0.1)(1-0.1) = 10
n*0.1*0.9 = 10
n*0.09 = 10
n = 10/0.09
n = 111
We have already 50 adults , so the required number of adults are 111 - 50 = 61
b)
p = 0.15
np(1-p) >= 10
n*0.15(1-0.15) = 10
n*0.15*0.85 = 10
n *0.1275 = 10
n = 78.43
We have already 50 adults , so the required number of adults are 78 - 50 = 28
8.2.23 Question Help A researcher studying public opinion of proposed Social Security changes obtains a simple...
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