According to the Kaiser Family Foundation, U.S. workers who had employer-provided health insurance paid an average premium of $4129 for family health insurance coverage during 2011 (USA TODAY, October 10, 2011). Suppose a recent random sample of 25 workers with employer-provided health insurance selected from a city paid an average premium of $4517 for family health insurance coverage with a standard deviation of $580. Assume that such premiums paid by all such workers in this city are normally distributed. Does the sample information support the alternative hypothesis that the average premium for such coverage paid by all such workers in this city is different from $4129? Use a 5% significance level. Use both the p-value approach and the critical-value approach.
Answer to relevant QuestionsAccording to an estimate, the average total parent and student debt for new college graduates was $34,400 in 2010–11 (Time, October 31, 2011). A random sample of 500 of this year’s graduates showed that their average ...In each of the following cases, do you think the sample size is large enough to use the normal distribution to make a test of hypothesis about the population proportion? Explain why or why not. a. n = 30 and p = .65 b. n = ...Consider H0: p = .70 versus H1: p ≠ .70. a. A random sample of 600 observations produced a sample proportion equal to .68. Using α = .01, would you reject the null hypothesis? b. Another random sample of 600 observations ...Beginning in the second half of 2011, there were widespread protests in many American cities that were primarily against Wall Street corruption and the increasing gap between the rich and the poor in America. According to a ...Consider the following null and alternative hypotheses: Ho: µ = 120 versus H1: µ > 120 A random sample of 81 observations taken from this population produced a sample mean of 123.5. The population standard deviation is ...
Post your question