Are your finances, buying habits, medical records and phonecalls really private?

Question

Are your finances, buying habits, medical records and phonecalls really private? A real concern for many adults is thatcomputers and the Internet are reducing privacy. A survey conductedby Peter D Hart Research Associates for the Shell Poll was reportedin USA Today. According to the survey, 37% of adults are concernedthat employers are monitoring phone calls. Use the binomialdistribution formula to calculate the probability that: a. out of 5 adults, none is concerned that employers aremonitoring phone calls. b. out of 5 adults, all are concerned that employers aremonitoring phone calls. c. out of 5 adults, exactly 3 are concerned that employers aremonitoring phone calls. Are your finances, buying habits, medical records and phonecalls really private? A real concern for many adults is thatcomputers and the Internet are reducing privacy. A survey conductedby Peter D Hart Research Associates for the Shell Poll was reportedin USA Today. According to the survey, 37% of adults are concernedthat employers are monitoring phone calls. Use the binomialdistribution formula to calculate the probability that: a. out of 5 adults, none is concerned that employers aremonitoring phone calls. b. out of 5 adults, all are concerned that employers aremonitoring phone calls. c. out of 5 adults, exactly 3 are concerned that employers aremonitoring phone calls.

Explanation / Answer

For all the three questions, n = 5, p = 0.37 Let X be the number of adults that are concerned that employers aremonitoring phone calls X~(n = 5, p = 0.37) Use hand calculation by refering to statistical table OR consultwebsite like http://www.stat.tamu.edu/~west/applets/binomialdemo.htmlto compute binomial probability (a) P(X = 0) = 5C0 (0.37)0(0.63)5 = 0.0992 (b) P(X = 5) = 5C5 (0.37)5(0.63)0 = 0.0069 (c) P(X = 3) = 5C3 (0.37)3(0.63)2 = 0.201 Hope this helps!

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