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AP STATS A new cholesterol medication has been manufactured and a study is being conducted to determine whether its effectiveness depends on dose. When 25 milligrams of the medication was administered to a simple random sample (SRS) of 50 patients, 17 of them demonstrated a lower cholesterol level. When 65 milligrams of the medication was administered to another SRS of 40 patients, 10 of them demonstrated a lower cholesterol level. Which of the following test statistics is an appropriate hypothesis test? (2 points)

z equals open parenthesis 0.34 minus 0.25 close parenthesis minus zero all over the square root of the quantity 0.34 times the quantity 1 minus 0.34 all over 50 plus 0.25 times the quantity 1 minus 0.25 all over 40

z equals open parenthesis 0.34 minus 0.25 close parenthesis minus zero all over the square root of the quantity 0.3 times the quantity 1 minus 0.3 all over 50 plus 0.3 times the quantity 1 minus 0.3 all over 40

z equals open parenthesis 0.34 minus 0.25 close parenthesis minus zero all over the square root of the quantity 0.34 times the quantity 1 minus 0.34 all over 90 plus 0.25 times the quantity 1 minus 0.25 all over 90

z equals open parenthesis 0.34 minus 0.25 close parenthesis minus zero all over the square root of the quantity 0.3 times the quantity 1 minus 0.3 all over 90 plus 0.3 times the quantity 1 minus 0.3 all over 90

z equals open parenthesis 0.34 minus 0.25 close parenthesis minus zero all over the square root of the quantity 0.34 times the quantity 1 minus 0.34 all over 25 plus 0.25 times the quantity 1 minus 0.25 all over 65

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