Statistics Practice Exercise

Questions

1.       Calculate coefficient of correlation by the concurrent deviation.

 

Supply	Price
112	106
125	102
126	102
118	102
118	104
121	98
125	96
125	97
131	95
135	90

 

 

2.       The table shows the number of motor registrations in a certain territory for a term of 5 years and the sale of motor tyres by a firm in that territory for the same period.

 

Year	Motor Registrations	No of Tyres sold
1	600	1,250
2	630	1,100
3	720	1,300
4	750	1,350
5	800	1,500

 

1.       Find the regression equation to estimate the sale of tyres when the motor registration is known.
2.       Estimate sale of tyres when registration is 850