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To test the effectiveness of a new type of plastic handcuffs, a law enforcement agency puts the cuffs on a sample of 30 persons who belong to the local weightlifting club. None is capable to break free from the cuffs. What type of sampling technique does this represent? Explain your reasoning.
The area under the standard normal curve between 0 and 2 is twice the area under area between 0 and 1.
In fact, the amount of coverage is known to be approximately normally distributed with a standard deviation of 25 square feet. How large a sample should be taken to estimate the true mean coverage of all 1-gallon cans to within 5 square feet with ..
As long as there is either an upward or downward trend in the data, will a k-period moving average have a smaller mean square error than a moving average obtained with k+1 periods? Why or why not?
Craft one page brief of the statistical results (include any additional pages needed for any APA tables or graphs and the SPSS syntax and output) in which you do the following:
At the .01 level of significance, is the true mean greater than 10?
Suppose that you wish to perform a nonparametric test for a difference among the medians of three or more independent populations. Which of these tests would be appropriate?
what is the probability that a randomly selected value from the distribution will be greater than 2.1 standard deviations avoe the mean?
What percentage of items will weigh between 6.4 and 8.9 ounces?
Using six-step critical value approach, at the 0.05 level of significance, is there evidence that population mean delivery time has been increased below previous population mean value of 25 minutes?
Compute the minimum sample size required assuming that no prior information is avaiable?
Which conditional distributions do these statistics refer to, those of y at given catagories of x, or those of x at given categories of y? Set up a table with race of murderers as rows and race of victims as columns, showing the two conditional di..
What proportion of the variability in steel shipments for motor vehicles is described by regression equation?
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