A random sample of 13 health maintenance organizations (HMOs) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows. $$ 43,54,40,26,53,52,26,25,28,27,39,39,35 $$ Send data to calculator) Send data to Excel: Under the assumption that co-payment amounts are normally distributed, find a $$ 99 \% $$ confidence interval for the mean co-payment amount in dollars. Glve the lower limit and upper limit of the $$ 99 \% $$ confidence Interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit:

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Gray Parry · Accepted Answer

Lower limit: 41.2 Upper limit: 46.8

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