Two groups of mice were injected with a measured amount of tumor pulp. The first group of 27 mice was given a high dosage of chemotherapy while the second group of 30 mice was given a low dosage of chemotherapy. After forty days, the first group had an average tumor size of 0.51cc with a variance of 0.10; the second group had an average tumor size of 0.64cc with a variance of 0.045.
Were the tumor sizes of group 1 significantly smaller than those of group 2?
What is the critical value at a .05 significance level? (Notes: enter only the positive value if doing a two-tailed test; if the desired degrees of freedom are not on the table, use the degrees of freedom closest to your value.)
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