A researcher observed a rat respond for a food reward by pressing one of three levers in a cage. Pressing the lever to the right (R) produced no food reward, pressing the lever to the left (L) produced a single food pellet, and pressing the lever at the center (C) produced two food pellets. Because the center level produced the largest reward, the researcher hypothesized that the rat would press this lever most often. Each trial ended when the rat pressed a lever. The researcher recorded lever pressing for 30 trials:

L, L, R, L, R, C, R, L, C, L, L, C, C, C, R, C, R, C, L, C, C, L, C, C, C, L, C, C, C, C

(a) Create an ungrouped frequency distribution for these data.

(b) Do these data support the hypothesis? Explain.