216 Assume that student volunteers were assigned arbitrarily

2.16 Assume that student volunteers were assigned arbitrarily (according to a coin toss) either to be trained to meditate or to behave as usual. To deter- mine whether meditation training (the independent variable) influences GPAs (the dependent variable), GPAs were calculated for each student at the end of the one-year experiment, yielding these results for the two groups: MEDITATORS NONMEDITATORS 3.79 3.00 3.25 2.25 2.75 3.67 3.56 3.33 2.25 2.50 2.75 1.90 3.57 2.45 3.75 3.50 2.67 2.90 2.95 3.30 3.56 2.80 2.65 2.58 3.56 3.78 3.75 2.83 3.10 3.37 3.45 3.00 3.35 3.25 2.76 2.86 3.10 2.75 3.09 2.90 2.10 2.66 2.58 2.95 3.56 2.34 3.20 2.67 3.30 3.43 3.47 3.59 3.00 3.08 65 or meoutadbeS dish buton Cn the he la Then, b aisns, use the Same se ay

Solution

(a) GPA is the unit of measurement of these data

(b)

9

c)

Meditators	Frequency
1.6-2.0	0
2.0-2.5	3
2.6-3.0	6
3.1-3.5	6
3.6-4.0	9