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The manufacturer of a certain engine treatment claims that if you add their product to your engine, it will be protected from excessive wear.

The manufacturer of a certain engine treatment claims that if you add their product to your​ engine, it will be protected from excessive wear. An infomercial claims that a woman drove 6 hours without​ oil, thanks to the engine treatment. A magazine tested engines in which they added the treatment to the motor​ oil, ran the​ engines, drained the​ oil, and then determined the time until the engines seized. Complete parts ​(a) and ​(b) below.

​(a) Determine the null and alternative hypotheses that the magazine will test.

Upper H 0​:

▼ 

p

sigma

mu

▼ 

equals

greater than

less than

not equals

6

Upper H 1​:

▼ 

mu

sigma

p

▼ 

not equals

less than

equals

greater than

6

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Null hypothesis: H o :  μ ... View the full answer

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