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Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN: 9781680331141
Author: HOUGHTON MIFFLIN HARCOURT
Publisher: Houghton Mifflin Harcourt
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
Transcribed Image Text:A poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there
solid evidence that the earth is getting
global warming. The results are given in the accompanying data table. Use a 0.05 significance level to test the claim that the sex of the respondent is independent of the choice for the cause of global warming. Do
men and women appear to agree, or is there a substantial difference?
Human activity Natural patterns Don't know
Male
Female
344
350
171
148
28
29
29
Click here to view the chi-square distribution table.
Identify the null and alternative hypotheses.
Ho
H₁
and
are
and
are
Compute the test statistic.
(Round to three decimal places as needed.)
Find the critical value(s).
(Round to three decimal places as needed. Use a comma to separate answers as needed.)
What is the conclusion based on the hypothesis test?
Ho. There
to agree.
sufficient evidence to warrant rejection of the claim that the sex of the respondent is independent of the choice for the cause of global warming. Men and women
Time Remaining: 01:28:09
Mayt

Transcribed Image Text:K
A case-control (or retrospective) study was
investigate a relationship between the colors of helmets worn by motorcycle drivers and
the accompanying table. Using a 0.01 significance level, test the claim that injuries are independent of helmet color.
Color of Helmet
Black
White
Yellow
Red
Blue
Controls (not injured)
480
373
36
161
66
Cases (injured
205
120
9
67
32
or killed)
Click here to view the chi-square distribution table.
Identify the null and alternative hypotheses. Choose the correct answer below.
OA. H. Whether a crash occurs and helmet color are dependent
H₁: Whether a crash occurs and helmet color are independent
OB. Ho Injuries and helmet color are independent
H₁: Injuries and helmet color are dependent
OC. Ho Whether a crash occurs and helmet color are independent
H₁: Whether a crash occurs and helmet color are dependent
OD. H Injuries and helmet color are dependent
H₁: Injuries and helmet color are independent
Compute the test statistic.
(Round to three decimal places as needed.)
Find the critical value(s).
(Round to three decimal places as needed. Use a comma to separate answers as needed.)
a crash. Results are given
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