Suppose we want to know whether or not the mean weight between two different species of rat is equal. To test this, will perform a two sample t-test at significance level a = 0.05 using the following steps: Sample 1: Sample size n1 = 56 Sample mean weight x1 = 210 • Sample standard deviation s1 = 19.5 Sample size n2 = 50 • Sample mean weight x2 = 205 • Sample standard deviation s2 = 18.7 Step 1: State the hypotheses. Step 2: The level of significance, one/two-tailed test, degrees of freedom Step 3: Statistical Test Sample 2:

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