A medical study followed a sample of 14 heart patients who had received electronic pacemakers.  The time (in months) to the first electrical malfunction was recorded as follows: 7,  14,    20,    16,    22,    14,    12,    8,   12,      24,    7,     10,  20, 16 Find the 95% confidence interval for the population mean. Please type only the upper interval with three decimal places. For example if CI= ( 10.25, 15), you type 15 as your answer.

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