A proponent of a new proposition on a ballot wants to know the population percentage of people who support the bill. Suppose a poll is taken, and 580 out of 1000 randomly selected people support the proposition. Should the proponent use a hypothesis test or a confidence interval to answer this question? Explain. If it is a hypothesis test, state the hypotheses and find the test statistic, p-value, and conclusion. Use a 5% significance level. If a confidence interval is appropriate, find the approximate 95% confidence interval. In both cases, assume that the necessary conditions have been met.
Answer to relevant QuestionsIf we do not reject the null hypothesis, is it valid to say that we accept the null hypothesis? Why or why not? Shankaran and colleagues (2012) reported the results of a randomized trial of whole-body hypothermia (cooling) for neonatal hypoxic–ischemic encephalopathy (brain problems in babies due to lack of oxygen). Twenty-seven of ...In each case, choose whether the appropriate test is a one-proportion z-test or a two-proportion z-test. Name the population(s). a. A researcher takes a random sample of 4-year-olds to find out whether girls or boys are more ...A poll in California (done by the Public Policy Institute) asked whether the government should regulate greenhouse gases, and 751 out of 1138 likely voters said yes. However, when a different polling agency asked whether ...The mean age of all 2550 students at a small college is 22.8 years with a standard deviation is 3.2 years, and the distribution is right-skewed. A random sample of 4 students' ages is obtained, and the mean is 23.2 with a ...
Post your question