# A computer center recorded the number of programs it maintained during each of 10 consecutive years. Year

## Question:

Year Number of Programs

1 ........ 430

2 ........ 480

3 ........ 565

4 ........ 790

5 ........ 885

6 ........ 960

7 ........1200

8 ........1380

9 ........1530

10 ........1591

(a) Calculate the least squares regression line for the data shown.

(b) Plot the points and the line on the same graph.

(c) Find a 95% prediction interval for the number of programs in year 11 under the usual assumptions.

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**Related Book For**

## Probability And Statistical Inference

**ISBN:** 579

9th Edition

**Authors:** Robert V. Hogg, Elliot Tanis, Dale Zimmerman