One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from 11.4% in 1997) to 9.8%now. Suppose a survey in a large high school reveals that, in a random sample of 1,043 students, 96 report using illegaldrugs. Use a 0.05 significance level to test the principal's claim that illegal drug use in her school is below the currentnational average.Formulate the null and alternative hypotheses. Choose the correct answer below.OA. Ho: p=0.098Ha: p<0.098OC. Ho: p=0.098H₂: p 0.098OB. Ho: p<0.098Ha: p=0.098D. Ho: p=0.098H₂:p>0.098

From the provided information, Sample size (n) = 1043 From which 96 report using illegal drugs.…

Answered: One research study of illegal drug use…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Consider a drug testing company that provides a test for marijuana usage. Among 253 tested subjects, results from 25 subjects were wrong (either a false positive or a false negative). Use a 0.01 significance level to test the claim that less than 10 percent of the test results are wrong.
For a certain year, a study reports that the percentage of college students using credit cards was 87%. A college dean of student services feels that this is too high for her university, so she randomly selects 225 students and finds that 190 of them use credit cards. At the .01 significance level, is she correct about her university?
One research study of illegal drug use among 12-to 17-year-olds reported a decrease in use (from 11.4 % in 1997) to 9.8 % now. Suppose a survey in a large high school reveals that, in a random sample of 1,045 students, 95 report using illegal drugs. Use a 0.05 significance level to test the principal's claim that illegal drug use in her school is below the current national average Formulate the null and alternative hypotheses. Choose the correct answer below OA. H p 0.098 Ha p>0.098 O B. H p<0.098 Ha p 0.098 O C. H p 0 098 Ha p 0098 O D. H p 0.098 Ha p 0.098 Find the test statistic (Round to two decimal places as needed) Find the P-value for the found test statistic (Round to four decimal places as needed.) P-value Now make a conclusion Choose the correct answer below OA Reject H There is insufficient evidence to support the claim that illegal drug use in this principal's school is below the current national average O B. Reject H There is sufficient evidence to support the claim that…
Consider a drug testing company that provides a test for marijuana usage. Among 293 tested subjects, results from 29 subjects were wrong (either a false positive or a false negative). Use a 0.10 significance level to test the claim that less than 10 percent of the test results are wrong
An author argues that more American-born baseball players have birth dates in the months immediately following July 31 because that was the age cutoff date for nonschool baseball leagues. The table below lists months of births for a sample of American-bom baseball players and foreign-bom baseball players. Using a 0.05 significance level, is there sufficient evidence to warrant rejection of the claim that months of births of baseball players are independent of whether they are born in America? Do the data appear to support the author's claim? Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. 345 333 311 314 499 420 Bom in America Foreign Born 385 332 383 101 83 431 400 371 100 103 82 84 82 94 84 59 92 69 Identify the null and alternative hypotheses for this test O A. H: The frequency of births is independent of the month. H: The frequency of births is dependent of the month. OB. H: The frequency of births is dependent of the month. H: The frequency of births is independent…
An author argues that more American-born baseball players have birth dates in the months immediately following July 31 because that was the age cutoff date for nonschool baseball leagues. The table below lists months of births for a sample of American-born baseball players and foreign-born baseball players. Using a 0.05 significance level, is there sufficient evidence to warrant rejection of the claim that months of births of baseball players are independent of whether they are born in America? Do the data appear to support the author's claim? Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. Born in America 387 329 366 346 339 312 310 503 424 437 397 372 Foreign Born 101 81 84 81 93 82 59 90 69 99 104 81 Identify the null and alternative hypotheses for this test. O A. Ho: Months of births of baseball players are independent of where they are born. H1: : Months of births of baseball players are dependent of where they are born. B. Ho: The frequency of births is dependent of…
Consider a drug testing company that provides a test for marijuana usage. Among 266 tested subjects, results from 27 subjects were wrong (either a false positive or a false negative). Use a 0.10 significance level to test the claim that less than 10 percent of the test results are wrong.
Some people are concerned that new tougher standards and high stakes tests adopted in many states may drive up the dropout rate. The National Center for Education Statistics reported that the high school dropout rate for the year 2000 was 10.9%. One school district, whose dropout rate has always been very close to the national average, reports that 210 of their 1782 students dropped out last year. Use this sample data and a 0.05 significance level to test the claim that the national high school dropout rate is now greater than 10.9%. the p values: initial conclusion: a final conclusion about the original claim:
The drug Ritalin is designed to stimulate the central nervous system. In a random sample of 252 boys aged ten – twelve years old, it was found that 44 of the boys were taking Ritalin. It is known that the proportion of all boys aged 13 – 15 who take Ritalin is 24%. A researcher claims that the population proportions of boys who take Ritalin aged 10 – 12 is different than boys aged 13 – 15. Can you support this claim at the 5% significance level? a. Conduct a hypothesis test to test the claim at the 5% significance level. Be sure to state you Ho and Ha, your test statistic and p-value, whether or not you reject Ho and whether you support the claim. b. Show that you can use the large sample methodology. c. Write a complete sentence describing what a Type I error is in context.

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