Reference no: EM13111736
1. The National Safety Council reported that 52% of American turnpike drivers are men. A sample of 300 cars traveling southbound on the New Jersey Turnpike yesterday revealed that 170 were driven by men. With an α = 0.01 can it be concluded that a larger proportion of men were driving on the New Jersey Turnpike than the national statistics indicate?
a. State the Null and Alternative Hypotheses.
b. Determine the test statistic.
c. Determine and interpret the p-value
d. State your decision and interpret the results
2. A national TV News program reported that the mean price nationwide was $2.10 per gallon for self-serve regular unleaded gasoline. A random sample of 35 stations in the Milwaukee, Wisconsin, area revealed that the mean price was $2.12 per gallon and that the sample standard deviation was $0.05 per gallon. At the 0.05 significance level, can we conclude that the price of gasoline is significantly different in the Milwaukee area? Use the p-value method.
a. State the null and alternative hypotheses:
b. Compute the test-statistic.
c. Determine the p-value.
d. State your decision and interpret the results
3. Typically during any year, the mean amount of acid rain being deposited on New York city when measured by an electronic device is computed to be 0.75 parts per million (ppm) with a standard deviation of 0.01 ppm. Some critics believe that there has been a change in acid rain. Test this claim using the 0.05 level of significance, when a recent sample of 100 acid rain readings had a sample mean of 0.7522 ppm.
a. State the null and alternative hypotheses:
b. What is the critical value?
c. Compute the test-statistic.
d. State your decision and interpret the results
e. Determine and interpret the p-value
4. A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 0.04 of the true proportion. Find the sample size necessary. In a prior study, a sample of 200 people showed that 80 traveled overseas last year.
5. A washing machine manufacturer reported that an American family of 4 washes an average of one ton (2000 pounds) of clothes each year. If the standard deviation is known to be 187.5 pounds, find the probability that the mean of a randomly selected sample of 50 families of four will be between 1980 and 1990 pounds.
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Estimate the steady state concentration of so2
: A Power plant is the main point source of SO2 emissions for a 25 km2 area. Estimate the steady-state concentration of SO2 for this area from this point source given the following temperature data. Windspeed= 5km/hr.
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How will the concomitant increase in temperatures
: CO2 levels have increased worldwide due to anthropogenic emissions. Projections suggest these will continue to increase over the rest of our lifetimes.
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Student query-hypothesis testing
: OHIP records show the average length of stay in Ontario hospitals is 5.4 days. A researcher sampled 125 patient records at US hospitals and found that the mean stay was 4.6 days
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Write a report on telehealth
: Write a report on telehealth - Review of specific case studies - select a specific example. This may be the implementation of a system as reported in a journal article, or one aspect of a large national project.
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Determine and interpret the p-value
: State the Null and Alternative Hypotheses. Determine the test statistic. Determine and interpret the p-value
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What will the effect of this mutation be
: You isolate a mutant plant with a defective desaturase enzyme, such that it is no longer capable of homeoviscous adaptation when temperatures drop from 37 degrees centigrade (summer in Kansas) down to 10 degrees (fall temperatures).
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Central limit theorem-sampling distribution of sample mean
: Precisely (i.e., using specific numbers) what does central limit theorem tell us about sampling distribution of sample means for samples of this size from this population?
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Explain the difference in numbers
: Aerobic prokaryotic cells will derive 38 molecules of ATP per glucose molecule, assuming that the metabolic pathways are behaving purely catabolically, while eukaryotic cells will derive either 36 or 38 ATP molecules, depending on the cell type. E..
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Information about students t test
: The mean interview time for a standard questionnaire of 31.3 minutes was considered to be excessive so the schedule was revised, yielding a mean interview time for a sample of 40 subjects of 21.3 minutes
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