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The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.22 g/mi and standard deviation 0.057 g/mi. A company has 25 cars of this model in its fleet.
What is the level L (±0.0001) such that the probability that the average NOX level for the fleet is greater than L is only 0.03?
Linear correlation between two variables. Find the critical values of r given the number of pairs of data n and the significance level alpha. n = 11, Alpha = 0.01
Use the above information to calculate the number of watches (units) and the sales dollars we need in order for our flea market business to break even for the day.
What is the probability that during 5 minutes interval no one will enter the store? b) what time interval is such that the probability is 0.5 that no one will enter the store during that interval?
A farmer in South Carolina must decide which crop to plant next year on his land: corn, peanuts, or soybeans. The return from each crop will be determined by whether a new trade bill with Russia passes the Senate.
To exercise your skills, you are to perform the following using different tools available to you (e.g. Excel spreadsheet, graphing calculator, etc.) and write and explanation on your findings:
Explain why random samples are preferred to nonrandom samples.
After a one-hour standoff, what is the likelihood (in percentages) that the negotiation will end successfully? After four hours? After eight hours?
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
When a researcher tests at the ,p=.05,p=.01 or p=.001 levels they can only be used in relationship to evaluate risk to patients in implementing the decisions based on research findings.
A company has 25 cars of this model in its fleet. What is the level L such that the probability that the average NOX level for the fleet is greater than L is only 0.01?
What is the relationship between confidence intervals and hypothesis testing? How are they the same? How are they different?
Distribution and the method of moments estimators of the parameters are alpha(hat)= 5.23 and lambda(hat) = 21.3. Find an asymptotic 95% confidence interval for alpha.
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