In a controlled laboratory environment, independent random samples of 10 adults and 10 children were tested...

In a controlled laboratory environment, independent random samples of 10 adults and 10 children were tested by a psychologist to determine the room temperature that each person finds most comfortable. The study provided the following results:

Adults Children

Sample size 10 10

Sample mean (in degrees) 77.5 74.5

Sample variance 4.5 2.5

Which one of the following is the correct 99% confidence interval for the true difference in population mean temperatures that adults and children find most comfortable?

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orchestra answered 10 months ago

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