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svlad2 [7]
2 years ago
14

A cable installer charges $45.00 per hour

Mathematics
2 answers:
stellarik [79]2 years ago
7 0
Answer: c(h) = 45h + 60
Nitella [24]2 years ago
4 0

the answer is taco mkay

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The Median of this data is 17 :)

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.

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

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

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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.

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

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