The clinical trial for a new drug results in a p-value of 0.15. What decision should the scientists make? We accept the alternative hypothesis that the drug does work. We reject the alternative hypothesis that the drug does work. We accept the null hypothesis that the drug doesn't work. We cannot reject the null hypothesis that the drug doesn't work.
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The clinical trial for a new drug results in a p-value of 0.15. What decision should the scientists make?
We accept the alternative hypothesis that the drug does work.
We reject the alternative hypothesis that the drug does work.
We accept the null hypothesis that the drug doesn't work.
We cannot reject the null hypothesis that the drug doesn't work.
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- A decade old study found that the proportion of high school seniors who felt that getting rich was an important personal goal was 69%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H o and the alternative hypothesis H 1 that we would use for this test. H o: H 1:Simone read online that the failure rate in Arizona for the first attempt of the written driver’s test is 60%. Simone thinks the Arizona rate is less than 60%. To investigate, she selects an SRS of 50 Arizona drivers and finds that 27 failed their first written driving test. To determine if this provides convincing evidence that the failure rate for Arizona is less than 60%, 200 trials of a simulation are conducted. Simone’s hypotheses are: H0: p = 60% and Ha: p < 60%, where p = the true proportion of Arizona drivers who fail the first attempt of the written driver’s test. Based on the results of the simulation, the estimated P-value of this test is 0.035. Using a = 0.01, what conclusion should Simone reach? A) Because the P-value of 0.035 > a, Simone should reject H0. There is convincing evidence that the Arizona written driver’s test has a true first-attempt failure rate less than 60%. B) Because the P-value of 0.035 > a, Simone should reject H0. There is not convincing…University officials hope that changes they have made have improved the retention rate. Last year, a sample of 2019 freshmen showed that 1555 returned as sophomores. This year, 1661 of 2096 freshmen sampled returned as sophomores. Determine if there is sufficient evidence at the 0.10 level to say that the retention rate has improved. Let last year's freshmen be Population 1 and let this year's freshmen be Population 2. Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places Step 3 of 3: Draw a conclusion and interpret the decision.
- Solve the problem. A researcher conducts a hypothesis test on a population proportion. Her null and alternative hypothesis are Ho: p = 0.6 and Ha: P < 0.6. The test statistic and p-value for the test are z = -1.51 and p-value = 0.0655. For a significance level of a = 0.05, choose the correct conclusion regarding the null hypothesis. O None of these. O There is sufficient evidence to warrant rejection of the null hypothesis. There is insufficient evidence to warrant rejection of the null hypothesis. STEP 1/3 Routin We're findi answer you In the mea DIVE DEEPAnswer the following True or False: A hypothesis test was conducted to see if a new HIV vaccination reduces the risk of contracting the HIV virus. The implication of a Type Il error from the clinical trial is that the vaccination will not be approved when it indeed does reduce the risk of contracting the HIV virus. true O false14
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