In san jose a sample of 73 mail carriers showed that 30 had been bitten by an animal during one week. in san francisco in a sample of 80 mail carriers, 16 had received animal bites. is there a significant difference in the proportions? use a 0.05. find the 95% confidence interval for the difference of the two proportions.

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step-by-step explanation:

84/3.5 = 24

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step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6