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Use the given degree of confidence and sample data to find the margin of error in estimating the population mean. Replacement times for washing machines 90% confidence; n =41 the sample mean (x-bar) =10.9 years s=2.3 years
Use α =.01 and test for a significant difference. What is your conclusion?
If there are more than five missing pieces, the producer identifies the packager and issues a warning. What is the probability of a warning being issued at the packaging plant?
Applying the MSE measure of forecast accuracy, would you prefer a smoothing constant of x = 0.1 or x = 0.2 for the gasoline sale time series. Are the results the same if you apply MAE as the measure of accuracy?
the average score of all golfers for a particular course has a mean of 66 and a standard deviation of 5. suppose 100
according to a recent report by the government new home construction fell to an 18-month low in october 2010
1. urn 1 contains 5 red 4 white and 6 blue marbles. urn 2 contains 12 red 2 white and 3 blue marbles. one urn is chosen
Antonia Martinez, who is running for the state senate, makes this statement: - What has Martinez told us about taxes, educational costs, and welfare?
Determine the probability that a randomly selected exam will have a score of at least 71? What percentage of exams will have scores between 89 and 92?
0.71 of all college students like the idea of a new curriculum. if we select 90 students assume independence what is
A company's headquarters is located in downtown Chicago. The company is interested to know the mean driving time of its employees if they require their employees to start working at 6:00 am. Fifty employees are randomly sampled over four weeks and..
Testing for two Proportions - Is the difference between the averages statistically significant?
a boiler has five identical relief valves. the probability that any particular valve will open on demand is0.90.
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