The regression equation Y = 3 + 2X has been calculated from 6 pairs of values, with X ranging from 1 to 10. The correlation coefficient is 0.8. It is estimated that Y = 43 when X = 20. Which of the following are true?
(i) The estimate is not reliable because X is outside the range of the data
(ii) The estimate is not reliable because the correlation is low
(iii) The estimate is reliable
(iv) The estimate is not reliable because the sample is small