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A library subscribes to two different weekly news magazines, each of which is supposed to arrive in Wednesday's mail. In actuality, each one could arrive on Wednesday (W), Thursday (T), Friday (F), or Saturday (S). Suppose that the two magazines arrive indepen- dently of one another and that for each magazine P(W) = .4, P(T) = .3, P(F) = .2, and P(S) = .1. Define a random variable y by y = the number of days beyond Wednesday that it takes for both magazines to arrive. For example, if the first magazine arrives on Friday and the second magazine arrives on Wednesday, then y = 2, whereas y = 1 if both magazines arrive on Thursday. Obtain the probability distribution of y. (Hint: Draw a tree diagram with two generations of branches, the first labeled with arrival days for Magazine 1 and the second for Magazine 2.)
a new york timescbs poll asked the question what do you think is the most important problem facing this country today?
consider the number of subsets of a set with nelements. use the fact that there are cnk subsets of k elements with
Identifying Gender Discrimination After being rejected for employment. Does the resulting probability really support such a charge?
the table below gives information on coded length measurements in a machining process. the data shown are macrx and r
Neckwarmers. Mountainside Fleece sold 40 Neckwarmers. Solid-color neckwarmers sold for $9.90 each and print ones sold for $12.75 each.
The combined production level should not exceed 1200 units per month. The demand for product II is no more than half the demand for product I.
he life expectancy of a brand of hair dryer is normally distributed wiht a mean of four years and a standard deviation of 8 months.
Test the claim that the proportion of students in this district who use computers in school is at least 80%. State the correct hypotheses.
The owner of a local golf course wanted to determine the average age of the golfers that played on the course. In a random sample of 30 golfers that visited his course, the sample mean was 48.34 and the standard deviation was 9.327. Calculate a 90..
A man is on trial accused of murder in the first degree. The prosecutor presents evidence that he hopes will convince the jury to reject the hypothesis that the man is innocent. This situation can be modeled as a significance test with the followi..
Management wishes to know how many casks of each wine to make to maximize total. profit. Prepare the linear programming model for this problem.
suppose we were to play a game with the following rules. we pay 8 dollars to play the game. we then flip a possibly
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