Two 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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