4.2.36 In a survey of consumers aged 12 and older, respondents were asked how ma

Question

4.2.36

In a survey of consumers aged 12 and older, respondents were asked how many cell phones were in use by the household. (No two respondents were from the same household.) Among the respondents,

219

answered "none,"

278

said "one,"

360

said "two,"

138

said "three," and

94

responded with four or more. A survey respondent is selected at random. Find the probability that his/her household has four or more cell phones in use. Is it unlikely for a household to have four or more cell phones in use? Consider an event to be unlikely if its probability is less than or equal to 0.05

4.2.36

Explanation / Answer

probability that his/her household has four or more cell phones in use = 94 / ( 94+138+360+219+278) = 0.086317

It is n't unlikey event as the probability find is more than 0.05

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