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A tobacco company advertises that the average nicotine content of its cigarettes is at most 14 milligrams. A consumer protection agency wants to determine whether the average nicotine content is in fact greater than 14. A random sample of 300 cigarettes of the company's brand yield an average nicotine content of 14.6 and a standard deviation of 3.8 milligrams. Determine the level of ignificance of the statistical test of the agency's claim that µ is greater than 14. If a = .01, is there significant evidence that the agency's claim has been supported by the data?
assume that a practitioner decides to use a control chart wtih a 2.5-sigma limits. if normality can be assumed as
Find the optimal order quantity and what is the optimal total ordering cost per year vs. what is that cost with the current policy?
What are the assumptions of regression analysis and how do you evaluate them?
Find the P value or an interval containing the P value for the sample test statistic.
After an unusually dry atumn, a radio announcer ia heard to say, "Watch out! We'll pay for these sunny days later on this winter." Explain what he's trying to say, and comment on the validity of his reasoning.
according to the statistical abstract of the united states there are 31.1 millions one-person households 38.6 millions
In a study comparing individual performance with group performance
How many chicken sandwiches must the restaurant stock to be 99% sure of not running out on a given day?
If the true mean for Saturday sales is now $4500, what is the probability of accepting the (false) null hypothesis.
how old are college students? the national age distribution for college students is shown below. national age
A Tamiami shearing machine is producing 10 percent defective pieces, which is abnormally high. The quality control engineer has been checking the output by almost continuous sampling since the abnormal condition began.
suppose x represents a point picked at random from the interval 0.1 on the x-axis and y is a point picked at random
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