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Each computer chip made in a certain plant will, independently, be defective with probability .25. If a sample of 1,000 chips is tested, what is the approximate probability that fewer than 200 chips will be defective?
Use a decision tree to recommend a decision. What is the expected value of the market research information? What is the efficiency of the information?
the table below contains average house prices median income average monthly rent and percentage of flats that are
A random sample of 121 checking accounts at bank showed an average daily balance of $280 the standard deviation of the population is known to be $6. Find the standard error of the mean.
The monthly sales volume (in thousands of dollars) for a manufacturer of snow skis is seasonal (there tend to be more skis sold during fall and winter months than during warmer months). The following table shows the monthly seasonal indexes for th..
Find a 90% confidence interval for the population mean weight of all such turtles.
Explain the logic of the ordinary least Square (OLS) method? How are the least squares formulas for the slope and intercept derived?
Is it reasonable to conclude that the mean weekly salary of school teachers is lower at a .05 level of significance? Why?
What is the chance that stock will fall by more than 15% next month? What extra assumption are you making when replying this question?
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations of X and Y?
Perform all of the calculations to complete this table and compute the chi-square statistic and calculate degrees of freedom for this chi-square test for goodness-of-fit.
An investment firm with 10,000 clients would like to accurately forecast the average dollar amount their current customer will deposit over the coming year.
Find a 99% confidence interval estimate of the proportion of people who say that they voted.
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