Question: A survey of several 11 to 12 year olds recorded the following amounts spent on a trip to the mall: $23.78,$19.99,$16.77,$19.05 Construct the 80% confidence

A survey of several 11 to 12 year olds recorded the following amounts spent on a trip to the mall: $23.78,$19.99,$16.77,$19.05 Construct the 80% confidence interval for the average amount spent by 11 to 12 year olds on a trip to the mall. Assume the population is approximately normal.

Question: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

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