A survey of 22 retirees was taken. Among other things, the retirees were asked to report the age at which they retired. Here are those 22 ages (in years).

31, 42, 45, 47, 51, 52, 53, 53, 61, 61, 67, 68, 68, 68, 69, 69, 69, 72, 74, 74, 75, 77

Frequency 10 9 5 4 30 40 50 60 70 80 Age (in years) Mean (a) For these data, which measures of Median central tendency take more than one value? Choose all that apply. Mode None of these measures (b) Suppose that the measurement 31 (the Mean smallest measurement in the data set) were Median replaced by 25. Which measures of central tendency would be affected by the change? Mode Choose all that apply. None of these measures (c) Suppose that, starting with the original Mean data set, the largest measurement were Median removed. Which measures of central tendency would be changed from those of Mode the original data set? Choose all that apply. None of these measures (d) Which of the following best describes the Negatively skewed distribution of the original data? Choose only Positively skewed one. Roughly symmetrical