"test the claim" b. plz

MATLAB: An Introduction with Applications
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"test the claim" b. plz

11/15/2020
MyOpenMath
A concerned group of citizens wanted to determine whether the proportion of armed robberies in the
state of Texas was different in 2011 than in 2010. Research shows that of the 113,231 violent crimes in
Texas in 2010, 7,622 of them were armed robberies. In 2011, 7,439 of the 104,873 violent crimes were
in the armed robery category. Test at the 0.05 significance level.
Preliminary:
a. Is it safe to assume that
n2010 < 5 % of all violent crimes during 2010 and
n2011 <5 % of all violent crimes during 2011?
No
Yes
b. Verify np(1 - p) > 10. Round your answer to one decimal place.
n2010P (1 -- p) =
n2011P (1 – p) =
Test the claim;
a. Determine the null and alternative hypotheses.
Но: р2010 ?
На: р2010 ?
P2011
P2011
b. Determine the test statistic. Round to two decimal places.
c. Find the p-value. Round to four decimals.
p-value =
d. Make a decision.
Fail to reject the null hypothesis.
Reject the null hypothesis.
e. Write the conclusion.
There is sufficient evidence to support the claim that the proportion of armed robberies is
different in 2011 than 2010.
There is not sufficient evidence to support the claim that the proportion of armed
robberies is different in 2011 than 2010.
Transcribed Image Text:11/15/2020 MyOpenMath A concerned group of citizens wanted to determine whether the proportion of armed robberies in the state of Texas was different in 2011 than in 2010. Research shows that of the 113,231 violent crimes in Texas in 2010, 7,622 of them were armed robberies. In 2011, 7,439 of the 104,873 violent crimes were in the armed robery category. Test at the 0.05 significance level. Preliminary: a. Is it safe to assume that n2010 < 5 % of all violent crimes during 2010 and n2011 <5 % of all violent crimes during 2011? No Yes b. Verify np(1 - p) > 10. Round your answer to one decimal place. n2010P (1 -- p) = n2011P (1 – p) = Test the claim; a. Determine the null and alternative hypotheses. Но: р2010 ? На: р2010 ? P2011 P2011 b. Determine the test statistic. Round to two decimal places. c. Find the p-value. Round to four decimals. p-value = d. Make a decision. Fail to reject the null hypothesis. Reject the null hypothesis. e. Write the conclusion. There is sufficient evidence to support the claim that the proportion of armed robberies is different in 2011 than 2010. There is not sufficient evidence to support the claim that the proportion of armed robberies is different in 2011 than 2010.
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