Question

help with this question

The cost of ink e s for k ids can bewust over the wo m an k cartridge will yd 500 pages. To this independent absured the page count of does this age or the company's is the number of pages that can be red from ink cartridge in anotto and found the rage p our to be sure the addition to this p somers. Acompany claims that is back ain Unga 95% orice your choice Set the correct choice and h ow to come Round capaces ded) O A Yes, because the company's him is between the lower to page and the period e ember e d by a

Answer 1

At 95% confidence level, the critical value is z_0.025 = 1.96

The 95% confidence interval is

$\bar x$ +/- z_0.025 *

a/Vn

= 458.1 +/- 1.96 * 46/$\sqrt {43}$

= 458.1 +/- 13.75

= 444.35, 471.85

Option - B) No, because the company's claim is not between the lower limit of 444.35 pages and the upper limit of 471.85 pages for the average number of pages yielded by a single black cartridge.