Question: Let 1 and 2 denote true average tread lives for two competing brands of size P205/65R15 radial tires. Test H0: 1 2 0

Let 1 and 2 denote true average tread lives for two competing brands of size P205/65R15 radial tires. Test H0: 1 2 0 versus Ha: 1 2 0 at level .05 using the following data:

m 45, x 42,500, s1 2200, n 45, y 40,400, and s2 1900.

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