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The campus bookstore must decide how many textbooks to order for a course that will be offered only once. The number of students who will take the course is a random variable D, whose distribution can be approximated by a (continuous) uniform distribution on the interval [40, 60]. After the quarter starts, the value of D becomes known. If D exceeds the number of books available, the known shortfall is made up by placing a rush order at a cost of $14 plus $2 per book over the normal ordering cost. If D is less than the stock on hand, the extra books are returned for their original ordering cost less $1 each. What is the order quantity that minimizes the expected cost?
Is there significance evidence that a difference exists between the actual males and female responses in this sample and the expected male/female responses in the population - What is your null hypothesis and what is your alternative hypothesis?
The use of coding has become particularly significant in recent years. One way to encrypt or code a message uses matrices and their properties. We start with a message coded into matrix form, called A. Multiply A by another matrix B to get AB and ..
Let four random variables X1, X2, X3, X4 have common mean m1=m2=m3=m4= 5 and common variance (sigma 1)^2= (sigma 2)^2= (sigma 3)^2= (sigma4)^2= 6 and common correlation coefficient p(sub ij)= .1, i does not equal j. Determine the mean and the vari..
Find the standard error of mean. Also establish an interval estimate around the sample mean using one standard deviation of the mean.
The distribution of amounts spent is approximately normal with a standard deviation of $10. Compute the probability of selecting a credit card customer at random and finding the customer charged between $70 and $83.
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a scale from 1 to 36. The distribution of ACT scores for more than 1 million students in a recent high school graduating class was roughly normal with..
wo baseball teams, the Toronto Jaybirds and the Philadelphia Cheesesteaks, are members of a fictitious baseball league. Whenever two teams in this league face each other, they play a series of up to five games. The first team to win three games wi..
Find the mean, median, range and standard deviation for the 2005 returns and estimate with 99% confidence the average order in the city.
the american lighting company developed a new light bulb that it believes will last at least 700 hours on average. a
a. Construct a simple price index for item Y using Year 0 as the base year. b. Determine the simple aggregate price index using Year 0 as the base year.
Suppose you are asked to list, in order of preference, the three best movies you have seen this year. If you saw 10 movies during the year, in how many ways can the three best be ranked? Is this a combination.
the distribution of the amount of money in savings accounts for florida residents has an average of 2200 dollars and a
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