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The opponents of soccer team A are of two types: either they are a class 1 or a class 2 team. The number of goals team A scores against a class i opponent is a Poisson random variable with mean λi , where λ1 = 2, λ2 = 3. This weekend the team has two games against teams they are not very familiar with. Assuming that the ?rst team they play is a class 1 team with probability 0.6 and the second is, independently of the class of the ?rst team, a class 1 team with probability 0.3, determine
(a) the expected number of goals team A will score this weekend.
(b) the probability that team A will score a total of ?ve goals.
the time to failure in hours of fans in a personal computer can be modeled by an exponential distribution with
A recent study, "[b]ased on data from a survey of nearly 1,500 Boston men aged 18 to 35 years...found that 16 percent of the men - about one in six -- said they had abused their partner physically or sexually within the past year.
a teacher finds that the scores of a particularly difficult test were normally distributed with a mean of 76 and
You use it to call 250 randomly chosen residential telephones in Florida. Of the registered voters contacted, 33% are registered Democrats. Is each of the boldface numbers a parameter or a statistic?
If you were opening a new business, what kinds of surveys or studies would you want to conduct before investing your time and money? How would you conduct these studies
peas are generated from parents having the greenyellow pair of genes so there is a .75 probability that an individual
there are 10 steps leading up to the library entrance. you walk up the stairs taking 1 step at a time 2 steps at a time
an experiment was conducted to compare the weights of the combs of roosters fed two different vitamin-supplemented
which of the following pairs of class limits would be appropriate for grouping the numbers 10 13 8 and 15 ? explain why
Determine the least squares equation. According to this information, what are the estimated sales for 2005? Listed below is the net sales in $ million for Home Depot, Inc. and its subsidiaries from 1993 to 2002.
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
of federal taxpayers who itemize their deductions and have adjusted gross incomes between 35000 and 50000 the dollar
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