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..11 Verizon 9:11 PM * 67% Reader View Available (198 EpS Ep8-The Members...The King's.... My Course MTH-243.. WeBWo. tland C... NW Logged in as aaron hodges Log Out & webwork/ mth243-rupp-201801 significance testing 4 MAIN MENU Courses homewotkSignificance Testing: Problem 4 Sets Previous Problem Problem List Next Problem Prob (1 point) A recent poll of 2300 randomly selected 18-25-year-olds revealed that 266 currently use marijuana or hashish. According to a publication, 12.6% of 18-25-year-olds were current users of marijuana or hashish in 1997. Do the data provide sufficient evidence to conclude that the percentage of 18-25 year-olds who currently use marjuana or hashish has changed from the 1997 percentage of 12.6% ? Use -0.01 as the level for declaring significance. User Settings Grades the sample's test statistic z is the positive critical z score for declaring significance is the negative critical z score for declaring significance is Problem 1 Problem 2 The conclusion is Problem 3 A. There is not sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marjuana or hashish has changed from Problem 4 the 1997 percentage of 12.6% B. There is sufficient evidence to conclude that the percentage of 18-25 Problem 5 year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.6% Problem 6 Problem 7 Note: You can earn partial credit on this problem. Problem 8 Preview My Answers Submit Answers Problem 9 You have attempted this problem 2 times. Your overall recorded score is 25%. You have unlimited attempts remaining. Show Past AnswersExplanation / Answer
The statistical software output for this problem is:
One sample proportion summary hypothesis test:
p : Proportion of successes
H0 : p = 0.126
HA : p 0.126
Hypothesis test results:
Hence,
Test statistic = - 1.4954505
Positive critical value = 2.576
Negative critical value = - 2.576
Conclusion: Option A is correct.
Proportion Count Total Sample Prop. Std. Err. Z-Stat P-value p 266 2300 0.11565217 0.0069195376 -1.4954505 0.1348Related Questions
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