An animal trainer in a circus is teaching 20 lions to perform a special trick. The lions have been divided into two groups, A and B. Group A gets positive reinforcement of food and favourable comments during the learning session, whereas, Group B does not. The following table indicates the number Of days needed by each lion to learn the trick: 78 95 69 79 111 65 88 73 Group A Group B 92 98 82 84 110 121 132 101 94 102 93 127 Using a 5% level of significance test the null hypothesis that the mean time for both groups is the same.

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An animal trainer in a circus is teaching 20 lions to perform a special
trick. The lions have been divided into two groups, A and B. Group A
gets positive reinforcement of food and favourable comments during
the learning session, whereas, Group B does not. The following table
indicates the number Of days needed by each lion to learn the trick:
Group A
78
95
73
65
88
82
69
111
84
92
110
Group B
121
132
101
79
94
102
93
98
127
Using a 5% level of significance test the null hypothesis that the mean
time for both groups is the same.
Transcribed Image Text:An animal trainer in a circus is teaching 20 lions to perform a special trick. The lions have been divided into two groups, A and B. Group A gets positive reinforcement of food and favourable comments during the learning session, whereas, Group B does not. The following table indicates the number Of days needed by each lion to learn the trick: Group A 78 95 73 65 88 82 69 111 84 92 110 Group B 121 132 101 79 94 102 93 98 127 Using a 5% level of significance test the null hypothesis that the mean time for both groups is the same.
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