Suppose that 26 of 200 tires of brand A failed to last 30,000
miles whereas the...
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Suppose that 26 of 200 tires of brand A failed to last 30,000miles whereas the corresponding figures for 200 tires of brands B,C, and D were 23, 15, and 32. Test the null hypothesis that thefailure rates of the four tire brands are 10% at the 0.05 level ofsignificance.
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Null and alternative hypothesis are Ho The failure rates of all brands are same Ha The failure rates of all brands are not same Degrees of freedom df number of categories 1 4 1 3 Degrees of
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