Find the lower and upper limit of the confidence interval

Reference no: EM13155531

toy manufacturer wants to see how long, on average, a new toy captures children's attention. He tests 9 children selected at random and finds that their mean attention span is 34 minutes with a standard deviation of 7 minutes. If we assume that attention spans are normally distributed, find a 95% confidence interval for the mean attention span of children playing with this new toy.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.

What is the lower limit of the confidence interval.
What is the upper limit of the confidence interval.

Reference no: EM13155531

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