Students in an experimental psychology lab time how long it takes rats to run a maze. Ten students run the same 20 rats. Here is the average running time (to the nearest second) for each rat:

a. Create a grouped frequency table in 10-s intervals.

b. Create a grouped frequency table in 15-s intervals.

c. Create a grouped frequency table in 20-s intervals.

d. Which table gives the clearest picture of the data?

Transcribed Image Text:

Rat # 1 2 3 4 in 5 Seconds 32 25 67 45 64 Rat # 6 7 8 9 10 Seconds Rat # 106 46 66 52 43 11 12 13 14 15 Seconds Rat # 78 16 112 17 63 76 45 18 19 20 Seconds 38 68 36 96 103 0⁰0