Question

An entrepreneur in Vubwi is contemplating on investing in farming in the 2018 farming
season. It is argued that maize yield (number of 50kg bags) depends on the quantity of
fertilizer (number of bags) used. To understand the relationship between the two
variables, she collects the following data from 10 farmers in relation to the previous
farming season:

Farmer	Yield	Fertilizer
1	400	6
2	440	10
3	460	12
4	480	14
5	520	16
6	580	18
7	600	22
8	680	24
9	740	26
10	800	32

A. Determine the regression line for this data. [6 Marks]
B. What is the correlation coefficient? [3 Marks]
C. Test the claim of no linear association between the two variables at 5% level of
significance. [7 Marks]
D. What is the coefficient of determination? [2 Marks]
E. What does the coefficient of determination tell you? [2 Maks

Answer 1