Mathematics, 11.11.2019 19:31 Kaiyla44
Arecent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. suppose that a survey of 100 localseniors and 100 national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. locally, 69 seniors reported using drugs or alcohol within the past month, while 60 national seniors reported using them. conduct a hypothesis test at the 5% level of significance. a. what is the test statistic? (if using the z-distribution round your answer to two decimal places, and if using the t-distribution round your answer to three decimal places.)b. what is the p-value? (round your answer to four decimal places.) explain what the p-value means for this problem. possible choices for p-value means for this problem: 1) if h0 is true, then there is a chance equal to the p-value that the proportion of students who use drugs and alcohol locally is 0.09 less than the proportion of students who use drugs and alcohol nationally.2) if h0 is false, then there is a chance equal to the p-value that the proportion of students who use drugs and alcohol locally is 0.09 less than the proportion of students who use drugs and alcohol nationally. 3) if h0 is true, then there is a chance equal to the p-value that the proportion of students who use drugs and alcohol locally is at least 0.09 more than the proportion of students who use drugs and alcohol nationally.4) if h0 is false, then there is a chance equal to the p-value that the proportion of students who use drugs and alcohol locally is at least 0.09 more than the proportion of students who use drugs and alcohol nationally.
Answers: 3
Mathematics, 21.06.2019 19:50
Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.
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Mathematics, 21.06.2019 20:30
Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i
Answers: 1
Mathematics, 21.06.2019 23:50
If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?
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Mathematics, 22.06.2019 00:30
Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)
Answers: 2
Arecent drug survey showed an increase in the use of drugs and alcohol among local high school senio...
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