Question

Asked Nov 7, 2019

PrintTech, Inc. is introducing a new line of ink-jet printers and would like to promote 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.)

3,104 | 2,773 | 2,491 | 2,567 | 2,509 | 2,839 | 2,500 | 2,524 | 4,018 | 3,133 |

a) What is the point estimate of the population mean? **(Round your answer to 2 decimal places.)**

b) Develop a 98% confidence interval for the population mean.**(Round your answers to 2 decimal places.)**

Confidence interval for the population mean is between ______and ______

Step 1

The point estimate of the population mean is the sample mean. Therefore, the sample mean is obtained as follows:

Step 2

*Descriptive statistics:*

Step-by-step procedure to obtain the descriptive statistics using Excel:

- In Excel sheet, enter the data of
**Sample**in any of the column. - In
**Data**, Select**Data Analysis**and Choose**Descriptive Statistics**. - In
**Input Range**Select variables**Sample**and Click**Labels in First Row**. - Select
**Summary Statistics**. - Click
**Ok**.

Output obtained using Excel is as follows:

Step 3

From the output, the sample mean is 2,845.80. Thus, the point estimate of the population mean is 2,845.80.

**b.**

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