On each trial of an experiment, a participant is presented with a constant soft noise, which is interrupted at some unpredictable time by a slightly louder sound. The time it takes for the participant to react to the louder sound is recorded. The following list contains the reaction times (in milliseconds) for 25 trials of this experiment.

155, 202, 225, 227, 244, 245, 252, 265, 275, 275, 283, 317, 328, 333, 334, 340, 362, 379, 383, 413, 426, 488, 585, 631, 800

Frequency 12 11 10 10- 8 2 150 300 450 600 750 1000 Reaction time (in milliseconds) Mean (a) Which measures of central tendency do Median not exist for this data set? Choose all that apply. Mode None of these measures (b) Suppose that the measurement 155 (the Mean smallest measurement in the data set) were Median replaced by 71. 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