Question

Asked Dec 2, 2019

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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. An infomercial claims that a woman drove

3

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.

UpperH0:
3

▼

muμ

sigmaσ

pp

▼

not equals≠

less than<

greater than>

equals=

Upper H1:
3

▼

muμ

sigmaσ

pp

▼

not equals≠

equals=

less than<

greater than>

(b) Both engines took exactly 17 minutes to seize. What conclusion might the magazine make based on this evidence?

The infomercial's claim is true.

The Informericial not true

Step 1

(a)

From the given information, the claim of the problem is the average hours without oil is equal to 3.

**Null Hypothesis:**

*H*0: µ=3.

**Alternative Hypothesis:**

** **

*H*1: µ≠3.

Thus, the c...

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