The manufacturer of a new line of ink-jet printers would like to include as part

Question

The manufacturer of a new line of ink-jet printers would like to include as part of its advertising the number of pages a user can expect from a print cartridge. A sample of 10 cartridges revealed the following number of pages printed. (Use t Distribution Table.) 3,250 2,450 2,550 2,610 2,730 2,610 2,330 3,870 2,510 3,280

Develop a 95% confidence interval for the population mean. (Round your answers to 2 decimal places.)

Develop a 95% confidence interval for the population mean. (Round your answers to 2 decimal places.)

Explanation / Answer

For the given data, mean = 2819 and std. dev. = 462.7407

standard error = 462.7407/sqrt(10) = 146.3315

For 95% CI, t value is 2.2622

lower limit = mean - t*SE = 2819 - 2.2622*146.3315 = 2487.97

upper limit = mean + z*SE = 2819 + 2.2622*146.3315 = 3150.03

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.