What two assumptions must be met when you are using the z test to test differences between two means? Can the sample standard deviations s1 and s2 be used in place of the population standard deviations 1 and s2?
Answer to relevant QuestionsA researcher wishes to see if the average length of the major rivers in the United States is the same as the average length of the major rivers in Europe. The data (in miles) of a sample of rivers are shown. At a = 0.01, is ...The mean for the number of weeks 15 New York Times hard-cover fiction books spent on the bestseller list is 22 weeks. The standard deviation is 6.17 weeks. The mean for the number of weeks 15 New York Times hard-cover ...The number of points held by a sample of the NHL’s highest scorers for both the EasternConference and the Western Conference is shown below. At α = 0.05, can it be concluded that there is a difference in means based on ...The weights in ounces of a sample of running shoes for men and women are shown. Test the claim that the means are different. Use the P-value method with α = 0.05. a. State the hypotheses and identify the claim. b. Find the ...At a recent PGA tournament (the Honda Classic at Palm Beach Gardens, Florida) the following scores were posted for eight randomly selected golfers for two consecutive days. At α = 0.05, is there evidence of a difference in ...
Post your question