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Dry bleach. The net weight (in ounces) of boxes of dry bleach are monitored by taking samples of 4 boxes from each hour's production. The process mean should be µ = 16 oz. Past experience indicates that the net weight when the process in properly adjusted varies with σ = 0.4 oz. The mean weight for each hour's sample is plotted on an x control chart. Calculate the center line and control limits for this chart.
suppose a mutual fund qualifies as having moderate risk if the standard deviation of its monthly rate of return is less
a researcher wished to compare the effect of two stepping heights low and high on heart rate in a step-aerobics
Construct a 95% confidence interval on the population mean for the following sample data set:
Does this result support original claim, or is population percentage considerably less than 45%. Use alpha=.05 for level of significance.
If the sum of the squared deviations about the regression line is SSE = 40.0, what is the coefficient of determination?
an entrepreneur is considering the purchase of a coin-operated laundry. the current owner claims that over the past 5
two pain relief drugs are being considered. a random sample of 8 doses of the first drug showed that the average amount
Two companies, a and b, drill wells in a rural area. Company A charges a flat fee of $3500 to drill a well regardless of its depth. Company B charges $1000 plus $12 per foot to drill a well. the depths of wells drilled in this area have a normal dist..
In a study of the consumer's view of the economy, the probability that a consumer would buy a house during the year was 0.0013, and the probability that the consumer would buy a car during the year was 0.198. There was also a 0.0100 probability t..
a fan cost index is calculated for each of the professional sports to give an idea of what it costs a family to go to a
If, for a particular junction, the acceptor concentration is 1017/cm3 and the donor concentration is1016/cm3, find the junction built-in voltage. Assume ni = 1.5×1010/cm3.
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