1. Calculate the coefficient of correlation.
| Years |
2001 |
2002 |
2003 |
2004 |
2005 |
2006 |
2007 |
2008 |
| Index production |
100 |
102 |
104 |
107 |
105 |
112 |
103 |
99 |
| Calculate the coefficent of correation |
15 |
12 |
13 |
11 |
12 |
12 |
19 |
26 |
2. Calculate the coefficient of correlation.
| Size-group |
15-16 |
16-17 |
17-18 |
18-19 |
19-20 |
20-21 |
| No. of item |
200 |
270 |
340 |
360 |
400 |
300 |
| No. of defective items |
150 |
162 |
170 |
180 |
180 |
114 |
3. Find the correlation coefficient and regression lines for the following data: