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One of four different prizes was randomly put into each box of a cereal. If a family decided to buy this cereal until it obtained at least one of each of the four different prizes, what is the expected number of boxes of cereal that must be purchased? (Hint: Let X = # of boxes of cereal needed to get four prizes. Think of X as the sum of four random variables. Yi = # of boxes needed to get a prize you don't already have, i = 1, 2, 3, 4.)
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Students applying for admission to an MBA program must submit scores from the GMAT test, which includes a verbal and a quantitative component.
By using this data and incorporating seasonal effects, predict quarterly turnover for 2010.
Listed below are the highway fuel consumption amounts (in mi/gal) from cars in three different categories. Use a 0.05 signifiacance level to test the claim that the different car categories have the same median highway fuel consumption.
Uising a level of significance of .10, is there evidence that the population mean weight of the hats is greater than 3.5 pounds?
The process of using sample statistics to draw conclusion about the true population parameters is called:
If the writing scores for the population have a standard deviation of σ = 20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
A sample of 50 retirees is drawn at random from a normal population whose mean age and standard deviation are 75 and 6 years, respectively.
the inside diameter of a cylinder has specifications 1 - .03 cm. the machining process output follows a normal
Standard deviation 0.3 ton. What is the probability that a fully loaded truck of this model is (a) less than 6 tons, (b) more than 7 tons, (c) between 6 and 7 tons?
Suppose a population can be approximated by a normal model with expected value μ = 50 and standard deviation σ = 9.8. Find the probability that a random sample of size 4 has a mean x between 47.8 and 53.7.
In a random sample of 26 people, the mean number of books they had read in the past year was 14.93 books and the standard deviation was 16.60 books.
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