Question
wo owners of a cattle ranch, Robert and Val, want to find the average weight for the ranch's 200 cows. Instead of weighing all of
wo owners of a cattle ranch, Robert and Val, want to find the average weight for the ranch's 200 cows. Instead of weighing all of the cows:
- Robert weighs 25 cows and gets an average weight of 1,550 pounds (stdev = 50)
- Val weighs 100 cows and gets an average weight of 1,380 pounds (stdev = 50)
What is Val's margin of error, rounded to the nearest whole number? (The formula is 1.96 (std dev) /
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Introduction to Probability
Authors: Mark Daniel Ward, Ellen Gundlach
1st edition
716771098, 978-1319060893, 1319060897, 978-0716771098
