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Based on the data the assumption of a bell-shaped distribution, what score should be used for the two cutoffs?
The incidence of occupational disease in an industry is such that the workers have a 20% chance of suffering from it. What is the probability that out of six workers 4 or more will contract th
Compare these with the percentages specified by Tchebysheff theorem.
Using Tchebysheff's Theorem, determine the range of values that should include at least 89% of the data. Count the number of data values that fall into this range and comment on whether your interva
The mean wage is Rs. 75 per day, SD wage is Rs 5 per day for a group of 1000 workers and the same is Rs 60 and Rs 4.5 for the other group of 1500 workers. Find mean and standard deviation for
Calculate the difference in the average clutter between network and cable television.
What is sampling? Briefly explain the various methods of sampling. Carry out an analysis of variance at 5% level of significance.
They have decided that they will only give gifts to those customers whose number of visits in a one-month period is 1 standard deviation above the mean. Find the minimum number of visits required r
Distinguish between Classification and Tabulation of data. What are the types of Classification of data? Calculate mean and median for the following data.
A country library in Minnesota reported the following number of books checked out in 15 randomly selected months:Determine the range, variance, and standard deviation for sample data.
Construct a box and whisker plot and summarize the characteristics of the CFO salaries that it reveals
Suppose a random sample of 20 U.S. adults is taken. What is the probability that exactly eight adults invested in mutual funds?
A university found that 20% of its students withdraw without completing the introductory statistics course. Compute the probability that two or fewer will withdraw.
The report estimated that the average cost of books and supplies for first-time students at four-year public universities for the academic year had reached $898. A data set that would produce this
Determine the number of standard deviations the most extreme cost is away from the mean. If you were to advise a prospective student concerning the money the student should save to afford the cost o
Develop and solve a linear optimization model to determine the optimal mix to maximize profit, and write a short memo to the president, Kathy Chung, explaining the sensitivity information in languag
By how much would audience contact increase if an extra $100 were allocated to the promotional budget? Use shadow price in Sensitivity Report (you need to use Simplex Methods).
Use chi-square test to test if the two attributes (Performance and Training) in the following table are independent. Test at 5% level of significance.
Develop a Linear Programming Formulation which includes decision variables, objective function and constraints. State what your decision variables, objective function and constraints stand
At the 0.01 level of significance, use the five step p-value approach. (hint: use PHStat or other means to calculate the p-value)
Let L be the economic valuation of the loss of human life resulting from a coastal strike by the hurricane. Employ a decision tree to help these city officials make a decision that minimizes the exp
Approximately how many false positives would this test produce based on the updated probability P(~HIV|+)?
The sample consists of 80 females and 20 males, and has a total of 60 registered voters. If these data were used for a chi-square test for independence, the expected frequencies should have a total