Write the null and alternative hypothesis. Is this a right tailed, left tailed or two tailed test? Check whether the problem meets the assumptions necessary to perform the hypothesis test. List all the assumptions and how the problem meets the assumptions or does not meet the assumptions. Use Statcrunch and the information given in the problem to calculate the z test statistic. Write a sentence explaining the meaning of the test statistic. Use Statcrunch and the information given in the problem to calculate the P-value. Write a sentence explaining the meaning of the P-value. State whether you reject or fail to reject the null hypothesis and then write the conclusion for the hypothesis test. The United States has the highest rate in the industrialized world. In 2008 a random sample of 1014 teenage girls found that 326 of them were pregnant before the age of 20. Has the proportion of teenage pregnancy increased as of 2012? In 2012, a random sample of 1025 teenage girls was taken and 334 were found to be pregnant before the age of 20. (Use a 10% significance level.) While many Americans favor the legalization of marijuana, opponents of legalization argue that marijuana may be a gateway drug. They believe that if a person uses marijuana, then they are more likely to use other more dangerous illegal drugs. Use the table of random data given below to test the claim that marijuana users have a higher percentage of other drug use than non-marijuana users. (Hint: Use a 5% significance level.) Uses Other Drugs Total Uses Marijuana 87 213 Does not use Marijuana 26 219
Write the null and alternative hypothesis. Is this a right tailed, left tailed or two tailed test? Check whether the problem meets the assumptions necessary to perform the hypothesis test. List all the assumptions and how the problem meets the assumptions or does not meet the assumptions. Use Statcrunch and the information given in the problem to calculate the z test statistic. Write a sentence explaining the meaning of the test statistic. Use Statcrunch and the information given in the problem to calculate the P-value. Write a sentence explaining the meaning of the P-value. State whether you reject or fail to reject the null hypothesis and then write the conclusion for the hypothesis test. The United States has the highest rate in the industrialized world. In 2008 a random sample of 1014 teenage girls found that 326 of them were pregnant before the age of 20. Has the proportion of teenage pregnancy increased as of 2012? In 2012, a random sample of 1025 teenage girls was taken and 334 were found to be pregnant before the age of 20. (Use a 10% significance level.) While many Americans favor the legalization of marijuana, opponents of legalization argue that marijuana may be a gateway drug. They believe that if a person uses marijuana, then they are more likely to use other more dangerous illegal drugs. Use the table of random data given below to test the claim that marijuana users have a higher percentage of other drug use than non-marijuana users. (Hint: Use a 5% significance level.) Uses Other Drugs Total Uses Marijuana 87 213 Does not use Marijuana 26 219