8) A researcher computes a 90% confidence interval for the mean weight (in pounds) of widgets produced at a factory. The interval is (7.2, 8.9). Which of these is a correct interpretation of this interval? a) Out of all the widgets produced in all widget factories, 90% weigh between 7.2 and 8.9 pounds. b) We can be 90% confident that all the widgets weigh between 7.2 and 8.9 pounds. c) There’s a 90% chance the population mean is between 7.2 and 8.9 pounds. d) Ninety percent of all sample means are equivalent to the true mean weight of all widgets. e) We are 90% confident that the true mean weight of widgets is between 7.2 and 8.9 pounds.