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A vendor claims that the average weight of a sample shipment of parts is 2.84 kg. The customer randomly chooses 50parts and finds that the sample has an average weight of 1.98 kg. Suppose that the standard deviation of the population is known to be 0.45 kg. Using a level of significance of 0.05, test the hypothesis that the true average weight of the shipment is 1.98 kg. Assume that the weights are normally distributed. 1) state the null and alternative hypothesis. 2) identify if this is a one or two tailed test. 3) identify the critical values. 4) calculate the test statistic. 5) calculate the P-value. 6) State your conclusion.
Why is the interview, in general, such a poor measurement device for inferring personality traits?
Utility functions need not relate to dollar values. Here is a problem in which we know little about five abstract outcomes. What is important, however, is that a person who does know what A to E represent should be able to compare the outcomes..
What type of test is needed to analyze the data? What is the hypotheses (including the symbols used to state the hypothesis)?
Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under (1) a fixed-position layout and (2) a project layout.
The area of study is Sampling Methods and the Central Limit Theorem. Consider the digits in the phone numbers on a randomly selected page of your local phone book a population.
This problem introduces a simple meteorological model, more complicated versions of which have been proposed in the meteorological literature.
let xi be a random variable distributed normal mean i amp variance i2. assume that the random variables x1 x2 and x3
What is the probability that no one picked an envelope with their name in it? What is the pobability that at least one person picked an envelope with their name
During the war with Iraq in 1991 the Terraco Motor Company produced a lightweight, all terrain vehicle code named "J99 Terra" for the military. The company is now planning to sell the Terra to the public.
Rob Johnson is a product manager at Diamond Chemicals, which is considering whether to launch a new product line that will require it to build a new facility.
(a) How many moles of gas are in the cylinder? (b) What are the temperature and pressure of the gas at the end of the adiabatic compression stroke?
A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 175 or more of the new members are significantly overweight?
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