Mathematics, 14.04.2020 08:12 kenzierosa
A particular school district is concerned about the percentage of high schoolers who vape. In a random sample of 1478 high schoolers taken last year, 61 of them indicated on the anonymous survey that they vape. This year, the survey was given again and out of 1482 high schoolers, 181 of them indicated on the survey that they vape. Is there evidence that the vaping rate is now higher? a) Test at the 5% level b) Compute a 90% confidence interval for the difference in proportions.
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Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0
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A particular school district is concerned about the percentage of high schoolers who vape. In a rand...
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