The Following Are Numbers of Bar-Press Responses Recorded for a Group

Essay

The following are numbers of bar-press responses recorded for a group of 40 rats during extinction training, when no bar presses are reinforced. $$\begin{array} { l l l l l l l l l l l l l } 49 & 41 & 38 & 53 & 46 & 30 & 33 & 50 & 43 & 28 & 27 & 39 & 44 \\36 & 56 & 44 & 42 & 37 & 35 & 48 & 45 & 32 & 40 & 25 & 30 & 26 \\47 & 40 & 37 & 34 & 37 & 42 & 47 & 39 & 45 & 40 & 34 & 43 & 41 \\36 & & & & & & & & & & & &\end{array}$$
a. Set up an appropriately grouped frequency distribution.
b. From your grouped frequency distribution, find thei. mean ii. median iii. mode
c. For these data, which measure of central value is most appropriate? Why?