31) A market researcher asks the question How many individuals are in your house

Question

31) A market researcher asks the question How many individuals are in your household? Which of the following descriptive statistics is appropriate for summarizing the data that will be obtained? Multiple Choice a) b) c) d) e) f) A bar chart A histogram A pie chart A scatter diagram None of the above All of the above Entertainment A media consultant wishes to investigate generational differences in entertainment preferences. In order to accomplish this, 1000 individuals were asked two questions: Are you under age 20, or are you over 20 years of age? What is your preferred media entertainment? Allowable responses to the latter question were: radio, television, internet, or other. The data are summarized in the table below Preferred Entertainment Television I Yes No Radio 100 120 300 100 Internet 70 150 Other 130 30 Under Age 20? 32) Referring to Entertainment, find the conditional probability that an individual in the survey is under age 20 given that the individual's preferred entertainment is the internet. Multiple Choice a) 0.6000 b) 0.1167 c) 0.2200 d) 0.7000 e) 0.3182

Explanation / Answer

Ans:

31)histogram

Option b is correct.

32)

P(internet)=220/1000=0.22

P(under 20 and internet)=70/1000=0.07

P( under 20/Internet)=P(under 20 and internet)/P(internet)

=0.07/0.22=0.3182

Option e is correct.

under age 20 Radio television internet other Total Yes 100 300 70 130 600 No 120 100 150 30 400 Total 220 400 220 160 1000

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