A study by Experian found that 20% of consumers in New Jersey have 10 or more credit cards, compared to 11% in Tennessee. In a two-tail test at the 0.05 level of significance, and assuming the percentages are from independent samples of 100 consumers each, can we conclude that New Jersey and Tennessee consumers might not differ in terms of the percentage who have 10 or more credit cards? Determine and interpret the p-value for the test, then construct and interpret the 95% confidence interval for the difference between the population proportions.
Answer to relevant QuestionsGiven the information in Exercise 11.75, and using the 0.05 level of significance in comparing the sample standard deviations, were we justified in assuming that the population standard deviations were equal? Would your ...The Thorndikes have submitted a bid to be the sole supplier of swimming goggles for the U.S. Olympic team. OptiView, Inc. has been supplying the goggles for many years, and the Olympic committee has said it will switch to ...In using ANOVA to compare the means of several samples, what value would be expected for the calculated F-statistic if the population means really are the same? Explain. A study has been carried out to compare the United Way contributions made by clerical workers from three local corporations. A sample of clerical workers has been randomly selected from each firm, and the dollar amounts of ...Given the summary information in Exercise 12.34, verify the calculation of the 95% confidence interval for each of the treatment means. In exercise 12.34 A large investment firm claims that no discrepancy exists between the ...
Post your question