The cost of ink cartridges for inkjet printers can be substantial over the life of a printer. Printer manufacturers publish the number of pages that can be printed from an ink cartridge in an effort to attract customers. A company claims that its black ink cartridge will yield an average 2,314 pages. To test this claim, an independent lab measured the page count of 49 cartridges and found the average page count to be 2,290.2. Assume the standard deviation for this population is 213. Complete parts a and b. a. Create a 95% confidence interval. \boxed{} \leq x \leq \boxed{} (Round to two decimal places as needed.)
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Sample size (n) = 49 Sample mean (x̄) = 2290.2 Show more…
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