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A quality control engineer inspects a random sample of two hand-held calculators from each incoming lot of size 18 and accepts the lot if they are both in good working condition; otherwise, the entire lot is inspected with the cost charged to the vendor. What are the probabilities that such a lot will be accepted without further inspection if it contains
(a) 4 calculators that are not in good working condition;
(b) 8 calculators that are not in good working condition;
(c) 12 calculators that are not in good working condition?
what is the probability of selecting a sample mean of 7 or less , with a sample population of 9 and mean of 10 and a standard deviation of 3.
a bridge hand consisting of 13 cards is selected at random from an ordinary deck of cards. let h d c and s be the
calculate the standard deviation for the following sample and show your work. use the formula of your choice. use the
The plant manager wants to evaluate the capability of a critical cutting operation that he suspects might be the source of the gap problem. The nominal specification for this cutting operation is 25.500 inches.
To forecast future cigarette sales, the last four years' quarterly sales were recorded in the Excel file Tute10-Q1.xls. Calculate the 3-quarter and 5-quarter moving averages. Show the relevant graphs. Interpret the results. Compute MAD and SSE for ea..
suppose that the time owners keep their cars purchased new is normally distributed with a mean of 7 years and a
the probability that a person will have 01or 2 flat tires a year is 0.73 0.19 and 0.0o respectively. if ten people are
There are different types of forecasting models that can be used in business research. Each model is suitable for a type of historical demand data. Some data may have a trend, may be without a trend, or may be seasonal.
Determine the mean, median, and mode, determine the interquartile range and determine the variance and standard deviation - compute the mean and the median. What is the shape of the distribution? Decide with measure of central tendency works better..
Set up a hypothesis test to validate this claim. Using a significance level of .01 to test this hypothesis, what is your decision rule
suppose we select an srs of size n 100 from a large population having proportion p of successes. let p be the
Carry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.
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