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please work out on paper and write out the parts and formula before plugging in for example (xbar symbol)= 7.1 (sigma symbol) = __ etc.

please work out on paper and write out the parts and formula before plugging in for example (xbar symbol)= 7.1 (sigma symbol) = __ etc. and the formulas to plug into

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2. (5 points) Ten randomly selected people were asked how long they slept at night. The mean time was 7.I hours with the standard deviation 0.78 hour. Find a 95% confidence interval of the mean time. Assume the variable is normally distributed

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