only marginally significantp = 0.11
The observed results from 147 mutational events originating from 47 irradiated mice were in the direction of the expectation: 43% singles, 44% doubles, and 13% triples or more, but the difference was only marginally significant when the results were dichotomized into {1, 2+}, (chi-sq [ 1 ] = 2.52, p = 0.11).