Firebrick tire company wants to increase sales

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Reference no: EM13814927

Firebrick Tire Company wants to increase sales of its long running, low-end Roadmaster Tire brand with anew advertising campaign promoting they will last at least 28,000 miles [Mu=28,000 miles]. Tests with arandom sample [n=30 tires] show a sample mean [x=27,5000 miles] with a sample standard deviation [s=1664.8026 miles]. At a .05 level of significance, these tests indicate

a. Reject H_o: Z of -1.6450 = -1.6450

b. Do no reject H_o: Z of -1.6450 = -1.6450

c. The sample results are too close to either Reject H_o: or to not reject H_o:

d. The sample data are NOT conclusive. Conduct another sample.

e. None of the above answers is correct.

Reference no: EM13814927

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