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How many more sheep should be included in the sample if we want to say with 98% confidence that the population mean weight of the Jacob sheep is within 2.0 lb of the sample mean?
Household income does not tend to follow a normal distribution in a particular state, yet average income is approximately $45,000/year in this state, with a standard deviation of about $9000.
ESPN reported in sample of 1000 homes the proportion of people who watched the Texas v. Ohio State college football game this weekend was .6.
The following represents a project that should be scheduled using CPM. What is the probability of completing this project within 16 days?
We want to estimate the delay using the correlation analysis. Determine analytically the autocorrelation ryy(l) in terms of the autocorrelation rxx(l).
Solution throughout graphical method. Produced by a company linear programming model is used to describe the production schedule.
A computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amount of revenue
Establish a 99% Confidence interval about the difference in the proportion of the town voters and county voters who favor the proposal.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
The standard deviation of 0.01 inches. What is the probability that a randomly selected pencil will be less than 0.285 inches?
Confirm whether given random variable is binomial distribution or not. If this experiment is finished with replacement, explain why.
A sample of 60 smokers has a mean cotinine level of 125. Assuming that sigma=25, find the 90% confidence level estimate of the mean cotinine level of all smokers.
What is the mean of the sample proportion of pieces of unread mail? What is the standard error of the sample proportion?
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