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In a random sample of 200 person of a town 120 are found to the tea drinker.In a random sample of 500 person of another town 240 are found to be tea drinker.Is the proprtion of tea drinker in the two towns are equal? use .001 level significance.
The manufacturer would like to establish inventory levels such that there is only a five percent chance of running out of stock. Where should the manufacturer set the inventory level?
Suppose the Total Sum of Squares for a design with k=6 treatments and n=36 total measurements (six per treatment) is equal to 500. In each of the following cases, conduct an F-test of the null hypothesis that the mean responses for the treatments are..
The cost of an e-commerce website can vary a great deal. A market research team hypothesized that the cost of an average website is $3500.
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
If two voters are randomly selected for a telephone survey, what is the probability that the first one is a Democrat followed by a Republican?
Starting with the initial solution derived by the nw corner method identify the cell w/the best cost improvement index and the quantity that can be transferred to that cell.
If the distribution of mouth volumes is nearly Normal, what percentage of men and of women should have even larger mouths than these (higher than the highest listed above)?
Suppose that 245 such companies are selected independently and at random. What is the probability that 191 companies in the sample electronically monitor their employees?
The mean driving time is 35 minutes with a standard deviation is 10 minutes. What is the 98 percent confidence interval for the population mean?
What reasons for complaints do you think the hotel should focus on if it wants to reduce the number of complaints? Describe.
Given this information we could use a Z test for two independent means and conclude that indeed the sales are different when the soup is a featured item.
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y?
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