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If we are testing the difference between the means of two normally distributed populations with samples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is ____.
it is known that 81 of all new products introduced in grocery stores fail are taken off the market within 2 years. if a
Compute mean and standard deviation for sample of N = 8 females and sample of N = 8 for males.
suppose that the checkout time at a grocery store has a mean of 5 minutes and standard deviation of 2 minutes. estimate
Calculate the covariance
Cheating Gas Pumps When testing gas pumps in Michigan for accuracy, fuel-quality enforcement specialists tested pumps and found that 1299 were not accurate (within 3.3 oz when 5 gal is pumped), and 5686 were accurate.
A radio station that plays classical music has a "By Request" program each Saturday night. The percentage of requests for composers on a particular night are listed below:
Describe what happens when the sample standard deviations get smaller and discuss the effects of decreasing the sample size
a bottling company is supposed to fill bottles with an average weight of 16 ounces. the company randomly selects
do students who learned english as well as another language simultaneously score worse on the sat critical reading exam
Assume that the histogram of the data is approximately bell-shaped. Approximately how many of the 260 students had sleep times between 355 minutes and 455 minutes per night?
If one investment can give you $1200 with a probability of .20 and you could lose $800 with a probability of .80, and another investment can give you $600 with a probability of .70 and a loss of $300 with a probability of .30, which investment is ..
Three different methods for assembling a product were proposed by an industrial engineer. To investigate the number of units assembled correctly with each method
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