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yuradex [85]
3 years ago
5

The service manager of a car dealer wants to determine if owners of new cars (A) tune up their cars more frequently than owners

of older cars (B). From his records he takes a random sample of ten new cars and ten older cars and determines the number of times the cars were tuned up in the last 12 months. Assume the population variances are equal. State the null and alternative hypotheses to determine if new car owners tune up their cars more frequently than older car owners.
Mathematics
1 answer:
ivann1987 [24]3 years ago
6 0

Answer:

Null hypothesis: ∪ₐ = ∪ₓ

Alternative hypothesis: ∪ₐ ≠ ∪ₓ

Step-by-step explanation:

Null hypothesis: ∪ₐ = ∪ₓ

Alternative hypothesis: ∪ₐ ≠ ∪ₓ

where ∪ₐ represents mean of sample of new cars and ∪ₓ represents mean of sample of older cars.

Using a difference in means t test will help determine if new owners tune up their cars more frequently than older car owners.

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How do I simplify these expressions?<br> 5(x+8)+3<br> 3.6x-7-5.1x<br> 4+8x+2.2-10x
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Step-by-step explanation:

<u />

<u>Equation 1:</u>

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First, we can distribute the 5 to the (x+8) and get 5x + 40. Distributing is when we multiply the 5 by the first number (x) and then by the second number (8) Because they aren't like terms (don't both have x's) we cannot combine then and must keep them separated by a subtraction sign

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<u />

<u>Equation 2:</u>

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We can add 3.6x and -5.1x and get -1.5x

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<u />

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Now, putting these back into our equation would look like this:

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I'm not sure how much my explanations helped, but I hope you understand!!

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