The daily milk production of a herd of Guernsey cows has a Normal distribution with mean 73 pounds and standard deviation 15 pounds. That is, the milk production is distributed ?(73,15) for these cows. (a) What percent of Guernsey cows have milk production less than 60 pounds? (b) What percent of Guernsey cows have milk production between 60 and 90 pounds? (c) What milk production amount describes the lowest producing 30% of Guernsey cows?

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.