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Hypothesis Testing
1. ABC Company, a manufacturer of automobile tires claims that the average life of the product is 45,600 miles. A random sample of 15 tires was chosen and resulted to a mean life of 43,500 miles with a standard deviation of 3,000 miles. Based on the above results, can you accept the manufacturer's claim? Use a = 0.05

2. A herd of 1,500 steer was fed a special high-protein grain for a month. A random sample of 29 were weighed and had gained an average of 6.7 pounds. If the standard deviation of weight gain for the entire herd is 7.1, test the hypothesis that the average weight gain per steer for the month was more than 5 pounds.
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Hypothesis Testing 1 ABC Company A Manufacturer Of Automobile Tires Claims That The Average Life Of The Product Is 45600 Miles A Random Sample Of 15 Tires Was C class=

Sagot :

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