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vazorg [7]
3 years ago
8

currently get paid $12.00 an hour and I really want to make an extra $300.00 by working overtime. I'll need to work __________ e

xtra hours
Mathematics
1 answer:
9966 [12]3 years ago
4 0

Answer:

25

Step-by-step explanation:

300/12 = 25

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Step-by-step explanation:

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A research engineer for a tire manufacturer is investigating tire life for a new rubber compound and has built 16 tires and test
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Answer:

The 95% confidence interval for mean tire life is between 52,368.4 kilometers and 67,911 kilometers.

Step-by-step explanation:

We are in posession of the sample's standard deviation, so we use the students t-distribution to solve this question.

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Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.68

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The upper end of the interval is the sample mean added to M. So it is 60139.7 + 7771.3 = 67,911.

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