Question: A series of laboratory experiments using a heat release calorimeter was carried out to compare heat release rates (HRR) (kW/m^2 ) for two species of wood: basswood and red oak. Independent random samples of 10 specimens of each species were used in the experiments and the results were as follows:

Basswood

105.9 100.0 98.9 99.0 103.4 109.8 106.9 100.8 94.4 103.7

Red oak

94.6 91.3 91.5 91.4 86.8 99.5 78.0 93.7 79.9 81.6

Using Minitab, carry out a test of the null hypothesis that the mean HRR does not differ between groups. You should use a 5% level of significance. You may assume that HRR is Normally distributed in the two underlying populations, and that the variance of HRR in the two populations is the same. What do you conclude from the result of your test?

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