Let 1 and 2 denote true average tread lives (miles) for two competing brands of size P205 65R15 tires a b Test Ho 0 versus Ha M M 70 at level 05 using the following informa tion m 45, x 42,500, 2200, n 45, y 40,400, and 2 1900

Question: Let 1 and 2 denote true average tread lives (miles) for two competing brands of size P205/65R15 tires. a. b. Test Ho: -

Let μ₁and μ₂denote true average tread lives (miles) for two competing brands of size P205/65R15 tires.

Test Ho: - = 0 versus Ha: M-M 70 at level .05

using the following informa- tion: m = 45, x = 42,500, =

Test Ho: - = 0 versus Ha: M-M 70 at level .05 using the following informa- tion: m = 45, x = 42,500, = 2200, n = 45, y = 40,400, and 2 = 1900.

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