5. 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. HIGHEST LEVEL OF EDUCATIONAL ACHIEVEMENT Not High School High School Graduate But Not College Graduate Primary Source for News College Graduate Total Graduate Newspapers Local television Cable television 49 205 188 442 90 170 75 147 335 113 496 756 687 Internet 41 401 245 None 77 165 38 280 Total 370 1,437 693 2,500 (a) If an adult is to be selected at random from this sample, what is the probability that the selected adult is a college graduate or obtains news primarily from the internet? (b) If an adult who is a college graduate is to be selected at random from this sample, what is the probability that the selected adult obtains news primarily from the internet? (c) When selecting an adult at random from the sample of 2,500 adults, are the events "is a college graduate" and "obtains news primarily from the internet" independent? Justify your answer.

5. 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. HIGHEST LEVEL OF EDUCATIONAL ACHIEVEMENT Not High School High School Graduate But Not College Graduate Primary Source for News College Graduate Total Graduate Newspapers Local television Cable television 49 205 188 442 90 170 75 147 335 113 496 756 687 Internet 41 401 245 None 77 165 38 280 Total 370 1,437 693 2,500 (a) If an adult is to be selected at random from this sample, what is the probability that the selected adult is a college graduate or obtains news primarily from the internet? (b) If an adult who is a college graduate is to be selected at random from this sample, what is the probability that the selected adult obtains news primarily from the internet? (c) When selecting an adult at random from the sample of 2,500 adults, are the events "is a college graduate" and "obtains news primarily from the internet" independent? Justify your answer.

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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Have an amazing day. This is a FRQ and is for a review. Please be as concise and add as much detail as possible. Thank you

5. 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.
HIGHEST LEVEL OF EDUCATIONAL ACHIEVEMENT
Not High
Primary Source
for News
High School Graduate
But Not College
School
College Graduate
Total
Graduate
Graduate
Newspapers
Local television
49
205
188
442
90
170
75
335
Cable television
113
496
147
756
Internet
41
401
245
687
None
77
165
38
280
Total
370
1,437
693
2,500
(a) If an adult is to be selected at random from this sample, what is the probability that the selected adult is a
college graduate or obtains news primarily from the internet?
(b) If an adult who is a college graduate is to be selected at random from this sample, what is the probability that
the selected adult obtains news primarily from the internet?
(c) When selecting an adult at random from the sample of 2,500 adults, are the events "is a college graduate"
and "obtains news primarily from the interneť" independent? Justify your answer.
(d) The company wants to conduct a statistical test to investigate whether there is an association between
educational achievement and primary source for news for adults in the city. What is the name of the
statistical test that should be used?
What are the appropriate degrees of freedom for this test?

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