A large number of young people were selected and their age and the number of hou

Question

A large number of young people were selected and their age and the number of hours of TV watched per week were determined, with the following results. Hours of TV watched Age Hours 0-5 5-10 10-15 38 17 13 68 74 14 10-15 15-20 20-25 Total 41 18 137 41 Suppose you select a person at random from this group. Answer the folloning by rounding to two digits past the decimal. a) What is the probability the person is in the 10-1S age group? 0.5100 You are correct. Your receipt no. is 160-1964 b) What is the probability the student is in the 10-15 age group and watches 5-10 hours per week? 0.0600 01 Previoutnes ou are correct. receipt no. is 160-6845 c) What is the probability the student is in the 10-15 age group or watches 5-10 hours per week? o.8s Suiomit Anee Incorrect. Tries 4/s Previous Tries ) What is the probability the student is in the 10-15 age group if they watch 5-10 hours per week? 0.3400 ou are correct. Your receipt no. is 160-4600 n Previous Tries e) What is the probability the student watches 0-5 hours of TV if they are in the 20-25 age group? 0.s000 are correct. Pres Tries Your receipt no. is 160-5806

Explanation / Answer

P(Student in 10-15 age group or Watches 5-10 hours per week)

= P(10-15 age group) + P(Watches 5-10 hours per week) - P(Both)

= [(74 + 14 + 38) + (14 + 18 + 9) - 14] / (137 + 41 + 68)

= 153/246

= 0.62

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