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Suppose that you want to estimate the mean pH of rainfalls in an area that suffers from heavy pollution due to the discharge of smoke from a power plant. Assume that ? is in the neighborhood of 0.5 pH and that you want your estimate to lie within 0.1 of ? with probability near 0.95. Approximately how many rainfalls must be included in your sample (one pH reading per rainfall)? Would it be valid to select all of your water specimens from a single rainfall? Explain.
The reason for this difference is not understood. Here are the summary data. Determine if the male scores are significantly higher than the female scores.
a team of scientists is due to spend six months in antarctica carrying out research. one major piece of equipment they
The Department asks you to estimate a model that could ?t this situation. a) Do you think that a multinomial logit is a suitable model for this problem? Explain why.
Develop a seasonally adjusted forecast model for these sandwich sales data. Forecast demand for each season for 2004 using a linear trend line estimate for sales in 2004. Do the data appear to have a seasonal pattern?
a local pizzeria wants to know how much the average cost of an order is during lunchtime on wednesdays. they collected
Find out a linear equation in the form P = mt + b (y = mx + b) that gives the population, P, t years from 2010.
Which statistic technique can use.. when apply three treatment(treatment 1, treatment2, treatment3)on 2 dependent variable?(i applied 3 treatments consecutively and checked effect of them on 2 dependents variable. can i apply repeated measure of anov..
Use the data to Compute a 90% confidence interval to estimate the population average difference. Assume that the number of passengers is normally distributed.
in a data communication system several messages that arrive at a node are bundled into a packet before they are
A sample of 15 workers reveal the following minutes: 29, 38, 38, 33, 38, 21, 45, 34, 40, 37, 42, 30, 29, 35. Develop 98% confidence interval for the population mean. Interpret your result.
question assume that a procedure yields a binomial distribution with n trials and the probability of success for one
Flip the tree. Label all endpoints, supply all branch probabilities, and calculate and label an endpoint probabilities.
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