Does each of the following statements pertain to an estimate or an estimator? If the statement pertains to an estimate is it an interval estimate or point estimate? If the statement pertains to an estimator write the estimator. (i) The head of a publishing company says that the firm’s computer Science textbook will sell about 9000 copies in 2012. (ii) A census prefers the median to the mean as a measure of central tendency for the income distribution of families in a standard metropolitan city. (iii) A stock market analyst, who appears on the television programme, estimates that the price of a particular common stock will be between 50 and 60 at the end of six months."