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Assume that an airplane engine will fail, when in flight, with the probability 1-p independently from engine to engine; assume that the airplane will make the successful flight if at least 50%
Horace Mann, principal of the Jones Public School, has decided to develop a time series model to obtain the 2- and a 3-period moving average to forecast student enrollments for next term.
A fair die is rolled 36 times. Find out the standard deviation of even number (2, 4 or 6) outcomes?
In the most recent election, 20% of all eligible college students voted. If a random sample of 20 students were surveyed: Find out the probability that at least five students voted in electi
Of all individual tax returns, 37% comprise errors made by taxpayer. If IRS examiners are assigned randomly chosen returns in batches of 12, find out the mean and standard deviation for number of er
The J.O. Supplies Company purchases calculators from the Korean supplier. The probability of the defective calculator is 10%. If 15 calculators are chosen at random, find out the probability that 3
Solve the problem graphically1. Describe the optimal solution and objective function value in context of problem.
Graphically find out the sensitivity range of each objective function coefficient at optimal solution of linear program in Problem Four. Describe the meaning of each range in context of problem.
For each constraint that holds with the equality at optimal solution of linear program in Problem Four, perform following: Graphically find out the sensitivity range of right-hand-side value.
Evaluate the shadow price associated with the each sensitivity range found in part. Describe the meaning of shadow price in the context of problem.
For Mineral Mining Company problem in Problem Four, management considering leasing one of following two new trucks to replace excising one: Should company replace the ol
Assume 1.5 percent of antennas on new Nokia cell phones are defective. For the random sample of 200 antennas, find out the probability that:
The accounting department at Weston Materials, Inc., national manufacturer of unattached garages, reports that it takes 2 construction workers the mean of 32 hours and standard deviation of the 2 ho
What fraction of employees cost more than $1,500 per year for the dental expenses? Find out the fraction of employees cost between $1,500 and $2,000 per year? Estimate percent that didn't have any den
Illustrate out the term sampling error? Could the value of sampling error be zero? If it were zero, what would this mean?
Find out the expected shape of distribution of sample mean? Find out the likelihood of selecting sample with mean of at least $112,000?
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
A state meat inspector in Iowa has been given assignment of estimating mean net weight of packages of ground chuck labeled "3 pounds." Find out the estimated population mean?
A researcher wants to estimate difference in means of two populations. A random sample of 36 items from first population results in sample mean of 400.
Develop a 95% confidence interval to estimate D from following information. Suppose the differences are normally distributed in population. The standard deviation of difference is 1.14
A researcher is interested in testing whether there're differences in mean between population one and population two. He randomly picks a sample of 9 items from the population one resulting in mean
Restaurateur Danny Valentine is computing two sizes, Raymondville and Rosenberg, for his next restaurant. He wish to prove that Raymondville residents (population 1) dine out more often than the Ros
Employ the data and α=.01 to test to find out whether the variance of productivity for two shifts are the same. Suppose productivity is normally distributed in population.
Assume instead that the Department schedules one class of 100 (big class. Call the two discussion sections A and B. Consider the particular TA assigned to this course. Find out the proba
Please indicate if following statements is true or false. The cumulative frequency is sum of frequencies accumulated to the upper boundary of class in distribution.