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Question: A local authority has a pool of cars available for staff to use on official business. One particular make and model of car, of which the authority has a considerable number, claims to give a miles per gallon (mpg) performance of 52 mpg for simulated out-of-town driving. For a sample of 20 cars the transport manager has calculated that the actual mpg for such driving has been 47 mpg, standard deviation of 7 mpg.Based on this information would you conclude that the car manufacturer's claimed mpg is unrealistic? What assumptions have you had to make to reach a conclusion?
to compare the effects on energy intake of drinking wine either before or with a meal 11 men participated in a
Using the 2.5% significance level, can you conclude that the average credit limit for all new credit cards issued in 2008 is higher than the corresponding.
According to data, a particular brand of cigarettes contain an average of1.8milligrams of nicotine. An advocacy group commissions an independent test to see if the mean nicotine content is higher than the industry laboratory claims.(a) What areH0a..
scores are normally distributed with a mean of 100 and a standard deveiation of 15. the graph is right side 0.6 i need
Suppose you want to estimate the proportion of students at your college who are left-handed. You decide to collect a random sample of 200 students.
In a specific company, there are three levels of workers: skilled, unskilled, and manager. The owner of this company wants to know if the level of job satisfaction differs amongst the three levels of workers.
Of the estimated natural gas reserves in North America, 4.59 *10^9 m ^3 are in United States. 2.66*10^9 m^3 are in Canada, and 1.99*10^9 m^3 are in Mexico.
suppose that a point x y is to be chosen at random in the xy-plane where x and y are independent random variables and
In any given month, the probability that a manufacturer will have an accident is 35%, What is the probability that in a 6 month period, the manufacturer will have two or fewer accident free months?
We are interested in determining whether or not the population in favor of Candidate A is significantly more than 75%. The test statistic is?
a sample of 2 different calculators is randomly selected from a group containing 18 that are defective and 37 that have
An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula.
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