A survey on British Social Attitudes asked respondents if they had ever boycotted goods for ethical...
A survey on British Social Attitudes asked respondents if they had ever boycotted goods for ethical reasons (Statesman, January 28, 2008). The survey found that 23% of the respondents have boycotted goods for ethical reasons.
In a sample of ten British citizens, what is the expected number of people that have boycotted goods for ethical reasons? Also find the standard deviation.
Homework Answers
p=0.23
q=1-p =1-0.23. =0.77
n=10
1)Expected number of people that have boycotted goods for ethical reasons
=np
=0.23 * 10
=2.3
=3
2) standard deviation =√(npq)
=√(10* 0.23 * 0.77)
=1.771
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