How tall are college hockey players? the average height has been 68.3

     Problem   21)   A biologist has found the average weight   of 12 randomly selected mud turtles to be 8.7 lb with standard deviation 3.6   lb. Find a 90% confidence interval for the population mean weight of all such   turtles.          Problem 22)   How tall are college hockey players? The   average height has been 68.3 inches. A …

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