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A shipment of 1000 small lab mice arrives at the animal care facility with a nominal weight of 10 g per mouse. A sample of 20 mice is selected and weighed. The average weight of the sample is 10.2 g. From past shipments, it is known that the standard deviation of weight among mice is 2 g. Find a 95% confidence interval for the mean weight of all the mice in the shipment.
At the .01 level of signiicance, is the true mean greater than 10?
The changes on different days are assumed to be independent. What is the probability that after 2 days the stock will be at its original price? What is the probability that after 3 days the stock's price will have increased by 1 unit?
Standard deviation of 8.3 minutes. Assuming normality, at the a = .05 level, is there enough evidence to show the mean oil change time is different?
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company rnadomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
Production of the three machines one article is selected at random. if it found that this article is defective, what is the probability that it was manufactured by machine X?
Critically discuss the auto-covariance function of a stationary time series and its basic properties.
Compute the two weights that give the cutoff points for the three categories.
Suppose your prior on θ isuniform on [0, 1] and that she then makes two shots in a row. Assume that the outcomes of thetwo shots are independent.
On what method is the Excel based calculator that you have provided based on (Exact, Score, Wald, Adjusted Wald). Also, what method is the calculation in Minitab based on?
Suppose 12% of these workers work more than 48 hours. Based on this percentage, what is the standard deviation of number of hours worked per week for those workers.
Set up a null and alternative hypothesis to test whether this sample is falling below expectations.
Then comment on the effectiveness of the presentation: Were the frequency distributions used effectively to report the results? Why or why not?
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