The manufacturer of a new line of ink-jet printers would like to include as part
ID: 3149992 • Letter: T
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.)
3,470
2,560
2,550
2,500
3,170
2,500
2,220
3,430
2,730
3,390
What is the point estimate of the population mean? (Round your answer to the nearest whole number.)
Develop a 95% confidence interval for the population mean. (Round your answers to 2 decimal places.)
Confidence interval for the population mean is between and .
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.)
Explanation / Answer
A. point estimate of population mean
=sum of observations/sample size
=(3,470+2,560+2,550+2,500+3,170+2,500+2,220+3,430+2,730+3,390)/10
=28520/10
=2852
B.
standard error = z*s/sqrt(n) = 1.96*304.43/sqrt(10) = 188.69
95% CI:2852-188.69 < u < 2852+188.69
95% CI: 2663.31 < u < 3038.69
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