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For the following, describe the target population, sampling frame, sampling unit and observation unit. Is there any selection bias or inaccuracy of responses?
The article "What readers say about Marijuana" (Parade, July 31, 1994, p.6) reported "More than 75% of the readers who took part in an informal PARADE telephone poll say marijuana should be as legal as alcoholic beverages. "The telephone poll was announced on page 5 of the June 12th issue; readers were instructed to "Call 1-900-773-1200, at 75 cents a call, if you would like to answer the following questions. To participate, call between 8 am EDT on Saturday, June 11th and midnight EDT on Wednesday June 15th.
Compute β-error of test in part (a) if true difference in mean burning rate is 2.5 centimeters per second.
Identify the regression equation and make the prediction. Show your procedure, or explain how you reached your answer. Costs of Television: Find the best predicted quality score of a Hitachi television with a price of $1900. Is the predicted qualit..
The sample mean of the number of spots on the 6000 rolls, should be about If this die is rolled 6000 times, the number of times we get a 2 or a 3 should be about
Find an unbiased estimator of mp(1 - p)/n. Find the optimal estimator using the Rao-Blackwell Theorem.
One should never use a regression line to predict the dependent response variable when the independent value is outside of the data range of the original data set that was used to fit the line.
As part of their application for a loan to buy Lakeside Farm, a property they hope to develop as a bed-and-breakfast operation, the prospective owners have projected:
How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test
Compute the value of t. What is your decision regarding the null hypothesis?
A supervisor has noticed that sales for all departments world wide has been averaging $12,000 a month for a number of years. For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Manage..
A single test on a certain device costs more than the entire lot. It is therefore decreed that not more than three tests will be performed per lot.
Determine the variance of firm's profit for the month.
Find out the estimate of the population mean.The mean daily sales at the Stop and Go are $20,000 for a sample of 40 days. The standard deviation of the sample is $3,000.
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