A farmer has recorded the number of fertilizer applications to each of the fields in one section of the farm and, at harvest time, records the weight of crop per acre. The results are given in the table below:
(i) Draw a scatter diagram from the data.
(ii) Find the correlation and coefficient of determination between fertilizer applications and weight of crop per acre.
(iii) Test the significance of the correlation at the 5 per cent level.
(iv) Using your analysis, what advice, if any, could you give to the farmer?