The Following Samples Are Observations Taken from the Same Elements

question 80

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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