Two owners of a cattle ranch, Robert and Val, want to find the average weight for the ranch's 200 cows. Instead 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) / VN

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