14. Highway Speeds Listed below are speeds (mi/h) measured from southbound traffic on 1-280 near Cupertino, California (based on data from SigAlert). This simple random sample was obtained at 3:30 P.M. on a weekday. Use a 0.05 significance level to test the claim of the highway engineer that the standard deviation of speeds is equal to 5.0 mi/h. 62 61 61 57 61 54 59 58 59 69 60 67 15. Aircraft

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11. Cigarette Tar A simple random sample of 25 filtered 100-mm cigarettes is obtained,
that the tar content of filtered 100-mm cigarettes has a standard deviation different from
manufacture aircraft altimeters. A simple random sample of new altimeters resulted in the
and the tar content of each cigarette is measured. The sample has a standard deviation of
listed in Data Set 1 of Appe
have a mean of 47.6 cents and a standard deviation of 33.5 cents. If the amounts from 0 cents
method has errors with a standard deviation greater than 32.2 ft, which was the standird
minute.
3.7 mg (based on Data Set 10 in Appendix B). Use a 0.05 significance level to test lon of
a
3.2 mg.
which is the standard deviation for unfiltered king-size cigarettes.
12. Analysis of Pennies In an analysis investigating the usefulness of pennies t
portions of 100 randomly selected credit card charges from the author are
recorded, and they
to 99 cents are all equally likely, the mean is expected to be 49.5 cents and the ponulas
standard deviation is expected to be 28.866 cents. Use a 0.01 significance level to ter a
claim that the sample is from a population with a standard deviation equal to 28,866 c
If the amounts from 0 cents to 99 cents are all equally likely, is the requirement of a nomal
distribution satisfied? If not, how does that affect the conclusion?
13. Ages of Race Car Drivers Listed below are the ages (years) of randomly selected race car
drivers (based on data reported in USA Today). Most people in the general population have ages
that vary between 0 and 90 years, so use of the
cral population have a standard deviation of 22.5 years. Use a 0.01 significance level to test the
claim that the standard deviation of ages of all race car drivers is less than 22.5 years.
rule of thumb
that
suggests
ages
in the gen-
range
32 32 33 33 41 29 38 32 33 23 27 45 52 29 25
14. Highway Speeds Listed below are speeds (mi/h) measured from southbound traffic on
1-280 near Cupertino, California (based on data from SigAlert). This simple random sample
was obtained at 3:30 P.M. on a weekday. Use a 0.05 significance level to test the claim of the
highway engineer that the standard deviation of speeds is equal to 5.0 mi/h.
62 61 61 57 61 54 59 58 59 69 60 67
15. Aircraft Altimeters The Skytek Avionics company uses a new production meue
errors listed below. Use a 0.05 level of significance to test the claim that the new
a
production
Transcribed Image Text:11. Cigarette Tar A simple random sample of 25 filtered 100-mm cigarettes is obtained, that the tar content of filtered 100-mm cigarettes has a standard deviation different from manufacture aircraft altimeters. A simple random sample of new altimeters resulted in the and the tar content of each cigarette is measured. The sample has a standard deviation of listed in Data Set 1 of Appe have a mean of 47.6 cents and a standard deviation of 33.5 cents. If the amounts from 0 cents method has errors with a standard deviation greater than 32.2 ft, which was the standird minute. 3.7 mg (based on Data Set 10 in Appendix B). Use a 0.05 significance level to test lon of a 3.2 mg. which is the standard deviation for unfiltered king-size cigarettes. 12. Analysis of Pennies In an analysis investigating the usefulness of pennies t portions of 100 randomly selected credit card charges from the author are recorded, and they to 99 cents are all equally likely, the mean is expected to be 49.5 cents and the ponulas standard deviation is expected to be 28.866 cents. Use a 0.01 significance level to ter a claim that the sample is from a population with a standard deviation equal to 28,866 c If the amounts from 0 cents to 99 cents are all equally likely, is the requirement of a nomal distribution satisfied? If not, how does that affect the conclusion? 13. Ages of Race Car Drivers Listed below are the ages (years) of randomly selected race car drivers (based on data reported in USA Today). Most people in the general population have ages that vary between 0 and 90 years, so use of the cral population have a standard deviation of 22.5 years. Use a 0.01 significance level to test the claim that the standard deviation of ages of all race car drivers is less than 22.5 years. rule of thumb that suggests ages in the gen- range 32 32 33 33 41 29 38 32 33 23 27 45 52 29 25 14. Highway Speeds Listed below are speeds (mi/h) measured from southbound traffic on 1-280 near Cupertino, California (based on data from SigAlert). This simple random sample was obtained at 3:30 P.M. on a weekday. Use a 0.05 significance level to test the claim of the highway engineer that the standard deviation of speeds is equal to 5.0 mi/h. 62 61 61 57 61 54 59 58 59 69 60 67 15. Aircraft Altimeters The Skytek Avionics company uses a new production meue errors listed below. Use a 0.05 level of significance to test the claim that the new a production
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