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Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentrations increasing progressively...

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Statistics

Inorganic phosphorous is a naturally occurring element in allplants and animals, with concentrations increasing progressively upthe food chain (fruit < vegetables < cereals < nuts

Region I: x1;n1 = 12
540810790790340800
890860820640970720
Region II: x2;n2 = 16
750870700810965350895850
635955710890520650280993

(a) Use a calculator with mean and standard deviation keys tocalculate x1, s1,x2, and s2. (Round youranswers to one decimal place.)

x1=  ppm
s1=  ppm
x2=  ppm
s2=  ppm


(b) Let μ1 be the population mean forx1 and let μ2 be thepopulation mean for x2. Find an 80% confidenceinterval for μ1 − μ2.(Round your answers to one decimal place.)

lower limit     ppm
upper limitppm

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