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VARIANCE OF BALL BEARINGS DIAMETER MEASUREMENTS
The random sample of 20 ball bearings diameters X1 , X2 ,... , X20 , pos- tulated in Example 13.4 as being from a Gaussian distribution with μ = 10, resulted in an average measured diameter of x¯ = 9.86 mm, and a standard deviation s = 1.01 mm. Now consider the case in which the design standard deviation for the manufacturing process is speci?ed as σ = 0.9; compute the probability that any sample standard deviation will equal or exceed the observed value of S = 1.01 mm if the manufacturing process is still operating true to the original design speci?cations.
Rosa's Italian restaurant wants to develop forecasts of daily demand for the next week. Develop a forecasting chart, using MS Excel. Include the steps used in your forecast.
A sample of the math test scores of 35 fourth-graders has a mean of 82 with a standard deviation of 15.
chi-square test for independent of attributes.a random sample of students is interviewed to determine if there is an
two out of five adult smokers aquired the habit by age 14. if 400 smokers are randomly selescted find the probability
For each of the following hypotheses, decide whether a one-tailed or two-tailed test would be performed: Children with birth defects will score differently than the normal population on a measure of self-esteem.
for the data set below if you were to fit a regression equation what would the value of r2 be to two decimals? hint
The values of these variables are (0, 0) for high technology industry, (0, 1) for biotechnology companies, and (1, 0) for aerospace ?rms. Following is part of the computer output for this analysis. Interpret the out- put, and give a complete analy..
disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. the results from 100
a certain species of tree has an average life span of 130 ears. a researcher has notice a large number of trees of this
He came to work at 8:00 and began to make calls. By 11:00 a.m., his survey was done. Don't discuss what is not said. Discuss what is wrong with what is said.
question visit the australian bureau of statistics website and get the catalogue 6302.0 average weekly earnings
a bag contains 10 red marbles 5 yellow marbles and 7 green marbles. if one marble is randomly picked from the bag what
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