Three strains of rats were studied under 2 environmental conditions for their performance in a maze test. The error scores for the 48 rats were recorded as follows. Use a 0.01 level of significance to test the hypothesis that(a) There is no difference in error scores for different environments;(b) There is no difference in error scores for different strains;(c) The environments and strains of rats do notinteract.

Transcribed Image Text:

Strain Environment Bright 28 12 Mixed Dull 101 94 Free 33 83 22 23 25 10 36 86 36 14 41 76 33 56 122 83 22 58 35 23 Restricted 72 32 48 93 25 31 91 19 60 89 35 126 136 120 38 153 83 110 64 128 87 140 99 118