A = selected adult is a Not High School GraduateB= selected adult obtains news primarily from internetWhen selecting an adult at random from the sample of 2,500 adults, are the events “ is not high school graduate” or “obtains news primarily from the internet” independent? Justify your answer. What's the News?An advertising agency in a large city is conducting a survey of adults to investigate whether there is anassociation between highest level of educational achievement and primary source for news. The companytakes a random sample of 2,500 adults in the city. The results are shown in the table below.Primary Sourcefor NewsNewspapersLocal televisionCable televisionInternetNoneTotalHIGHEST LEVEL OF EDUCATIONAL ACHIEVEMENTNot HighHigh School GraduateBut Not CollegeSchoolGraduate49901134177370Graduate2051704964011651,437College Graduate1887514724538693Total4423357566872802,500

The question is about prob. of events Given : To find : Are events " is not high school grad. "…

Answered: A = selected adult is a Not High School…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A = selected adult is a Not High School Graduate

B= selected adult obtains news primarily from internet

When selecting an adult at random from the sample of 2,500 adults, are the events “ is not high school graduate” or “obtains news primarily from the internet” independent? Justify your answer.

What's the News?
An advertising agency in a large city is conducting a survey of adults to investigate whether there is an
association between highest level of educational achievement and primary source for news. The company
takes a random sample of 2,500 adults in the city. The results are shown in the table below.
Primary Source
for News
Newspapers
Local television
Cable television
Internet
None
Total
HIGHEST LEVEL OF EDUCATIONAL ACHIEVEMENT
Not High
High School Graduate
But Not College
School
Graduate
49
90
113
41
77
370
Graduate
205
170
496
401
165
1,437
College Graduate
188
75
147
245
38
693
Total
442
335
756
687
280
2,500

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Can I also use conditional probability in this problem to check whether the two events are independent? P(AIB)=P(A)? or P(BIA)=P(B)? If yes, how? Thanks!

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