Question: 7. It is believed that drinking has some bad effects on the human reproduction system. To study this, some evaluations of placenta tissue of 16

7. It is believed that drinking has some bad effects on the human reproduction system.

To study this, some evaluations of placenta tissue of 16 randomly selected drinking mothers were made that yielded the following values (recorded to the nearest whole number):

18 17 22 21 15 21 22 22 14 20 14 16 13 22 20 19 Assuming that these evaluations are normally distributed, determine a 99% confidence interval for the mean value for drinking mothers.

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