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A research group needs to determine a 80% confidence interval for the mean repair cost for all car
insurance small claims. From past research, it is known that the standard deviation of such claims
amounts to [tex]$130.52.
a. What is the critical value that corresponds to the given level of confidence?
Round your answer to two decimal places.
b. If the group wants their estimate to have a maximum error of $[/tex]11, how many small claims
should they sample?
Round your answer up to the next integer.
