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A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard deviation of 20.Determine the number of boxes,x,where 80% of the number of boxes received is less than x.
Levels of employee motivation in his organization are dropping leading to drop in employee productivity. Draft a research proposal to identify the problem and suggest a methodology for recommending a solution.
Use 9 classes. Is the histogram approximately bell shaped and symmetic? Does this agree with the results predicted by the Central Limite Theorem?
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
A study of cats and dogs found that 11 of 50 cats and 21 of 50 dogs slept more than 10 hours per day. At the .05 level of significance, is there sufficient evidence to conclude that a difference exists between the proportion of cats and the propor..
Rob works in quality at a well known saw blade company. An inspector on his team has uncovered an issue with the kerf dimension on the bandsaw blade line. Rob conducts a sampling study and finds that 7% of the bandsaw blades are out of spec.
If the hotel currently has 84 guests, find the probability that there will not be enough hot water. Does the current system appear to be effective?
In 35 of their stores they sold on the average 430 suits per year with a population standard deviation of 40. What is the test value for their claim?
At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
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.
Surface area of a cube. The formula A = 6V^-2/3(-2/3 power) gives the surface area of a cube in the volume V. What is the volume of a cube with a surface area 12 square feet?
Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let α = .05
According to US Census Bureau, 7.1% of all births to non-smoking mothers are of low birth weight (
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