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MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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It has been reported that 24% of all people fatally injured in a bicycle accident tested positive for
alcohol. In a study done of on 1711 fatally injured teenagers between the ages of 16 and 20, 542
tested positive for alcohol. A researcher is interested in determining if teenagers are more likely
to have alcohol in their system if they are involved in a fatal accident. He will use a significance
level of 0.04.
a)
What does it mean to have a significance level of 0.04?
b)
List the null and alternative hypothesis.
c)
What type of test will this be?
d)
State what a Type 1 error will be in this context.
e)
State what a Type 2 error will be in this context.
f)
Determine the standard error.
Determine the p-value.
h)
State the meaning of this p-value.
Is your result statistically significant?
i)
What should
you
do based on your p-value?
k)
Write a sentence reporting your result.
Transcribed Image Text:It has been reported that 24% of all people fatally injured in a bicycle accident tested positive for alcohol. In a study done of on 1711 fatally injured teenagers between the ages of 16 and 20, 542 tested positive for alcohol. A researcher is interested in determining if teenagers are more likely to have alcohol in their system if they are involved in a fatal accident. He will use a significance level of 0.04. a) What does it mean to have a significance level of 0.04? b) List the null and alternative hypothesis. c) What type of test will this be? d) State what a Type 1 error will be in this context. e) State what a Type 2 error will be in this context. f) Determine the standard error. Determine the p-value. h) State the meaning of this p-value. Is your result statistically significant? i) What should you do based on your p-value? k) Write a sentence reporting your result.
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