Question 1: A USA Today Snapshot states that the government claims that there is a significant difference in the mean credit card debts of households in New York and Texas. A sample of 250 households from each state gave these results: NY mean = $4446.25 with deviation = $845.70 while for TX the mean = $4567.24 with deviation = $561.95. At "alpha" = 0.10, is there a significant difference in debt? Part two: would your conclusion change if "alpha" were .05?
Question 2: The average AIMS test scores for two different teachers in Cochise County were 473 (8 students) and 459 (18 students.) The respective deviations were 39.7 and 24.5. Can it be concluded that the averages are different at Alpha = 0.10?
Question 3: Find the 90% confidence interval for problem #9 above.