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An investment project is expected to earn $100,000 on average with a standard deviation of $50,000. Assume earnings from this investment project is a normal distribution. Of the next 15 people that invest in this project, what is the probability that 5 or less people will result an annual net cash flow of at least $100,000.
Agricultural researchers are studying three different ways of planting peanuts to determine whether significantly different levels of production yield will result.
Perform a two-sample z-test for proportions to test if men are more likely than women to make online purchases of books.
It is very difficult for small businesses to be successful. The Small business administration estimates that 20 percent will dissolve or go bankrupt within two years. A sample of 50 new businesses is selected. (show work) (a) What is the mean and ..
A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.55 and a standard deviation of $0.44.
The measure of forecast accuracy that is not influenced by the measurement scale of the time series data is:
Determine the distributions given below represent a probability distribution. Justify your answer.
Solve the mean and standard deviation equations
What is the probability that a randomly chosen employee is an Administrator if the employee has the opportunity of gaining promotion next year?
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Suppose the arrival of these emails is approximated by the Poisson distribution.
Use PHStat to make a box-whisker plot. If PHSTAT has yet to be installed, calculate Xmin, Xmax, Q 1 , Q 3 and median using equation in Class Notes-Quartiles, Percentile & Dectiles.
Make a scatter plot, illustrate the regression lines. Determine the correlation coefficient between husband’s and wife’s education for couples in which wife is employed full time?
A meat processing plant has processed an average of 100 tons per day for the last several years. Newer processing machines have been installed recently.
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