The Following Samples Are Observations Taken from the Same Elements

question 28

Multiple Choice

The following samples are observations taken from the same elements at two different times: Assume that the populations are normally distributed and construct a 90% confidence interval for the difference in the means of the distribution at the times in which the samples were taken.

• A)(7.6232,13.4434)
• B)(5.2825,15.8127)
• C)(6.8212,14.7821)
• D)(7.4122,14.6801)

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