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t View History Bookmarks People Window Help nd the Sorcerer x ttps://webwork.ma 81%.", mi Sun 4:51 PM Emi ss 2018 Spring Mizzou Business x MU STAT 2500 SP18/wBwK1-Chland2/18/effectiveUser eghn9c&displayMode; MathJax&showd; MAA MATHEMATICAL ASSOCIATION OF AMERICA webwork / mu_ stat 2500 sp18/ wbwk1-chtand2 18 WBWK1-Ch1and2: Problem 18 Prev Up 2 pts) NOTE: Enter answers as percentages. Do not include the percent sign. To enter 50 percent you would type '50" (no quotes). In a certain county, the sizes of family farms approximabely follow mound-shaped (normal) distribution with a mean of 465 acres and a Next standard deviation of 26 acres. Accordng to the empirical rule, approximately b) According to the empirical rule, approximately According to the empirical rue, approximately percentage of family farms harve a size between 387 and 543 acres percentage of family tams have a size between 439 and 491 acres. percentage of family farms have a size between 413 and 517 acres Note: You can earn partial credit on this problem Preview AnswersSubmit Answers You have atempted this problem 0 times 8

Explanation / Answer

Given, xbar = 465, s = 26.

(a) xbar-(3*s) = 387 and xbar+(3*s) = 543.
Hence, 99.7 percent.

(b) xbar-(s) = 439 and xbar+(s) = 491.
Hence, 68 percent.

(c) xbar-(2*s) = 413 and xbar+(2*s) = 517.
Hence, 95 percent.

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