This maybe will use Rstudio.

15.36 Decay of polyester fabric in landfills. Here are the breaking strengths (in pounds) of strips of polyester fabric buried in the ground for several lengths of time:23 Time Breaking strength 126 2 weeks 4 weeks 8 weeks 16 weeks 118 130 122 124 120 136 98 126 114 128 110 120 126 146 140 129 128 140 110 Breaking strength is a good measure of the extent to which the fabric has decayed. (a) Find the standard deviations of the 4 samples. They do not meet our rule of thumb for applying ANOVA. In addition, the sample buried for 16 weeks contains an outlier. We will use the Kruskal- Wallis test. (b) Find the medians of the four samples. What are the hypotheses for the Kruskal-Wallis test, expressed in terms of medians? (c) Carry out the test and report your conclusion. 15.36 Decay of polyester fabric in landfills. Here are the breaking strengths (in pounds) of strips of polyester fabric buried in the ground for several lengths of time:23 Time Breaking strength 126 2 weeks 4 weeks 8 weeks 16 weeks 118 130 122 124 120 136 98 126 114 128 110 120 126 146 140 129 128 140 110 Breaking strength is a good measure of the extent to which the fabric has decayed. (a) Find the standard deviations of the 4 samples. They do not meet our rule of thumb for applying ANOVA. In addition, the sample buried for 16 weeks contains an outlier. We will use the Kruskal- Wallis test. (b) Find the medians of the four samples. What are the hypotheses for the Kruskal-Wallis test, expressed in terms of medians? (c) Carry out the test and report your conclusion