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Nana76 [90]
1 year ago
8

Keith bought a tree for his backyard. The graph shows the height of the tree after a certain number of years.

Mathematics
1 answer:
Vikentia [17]1 year ago
7 0

Answer:18

Step-by-step explanation:

Its is 18 caycausecause the arrow is pointing next to it

1

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Using the t-distribution, it is found that the p-value of the test is 0.007.

At the null hypothesis, it is <u>tested if the mean lifetime is not greater than 220,000 miles</u>, that is:

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At the alternative hypothesis, it is <u>tested if the mean lifetime is greater than 220,000 miles</u>, that is:

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t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}

The parameters are:

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For this problem:

\overline{x} = 226450, \mu = 220000, s = 11500, n = 23

Then, the value of the test statistic is:

t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{226450 - 220000}{\frac{11500}{\sqrt{23}}}

t = 2.69

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Using a t-distribution calculator, the p-value of the test is of 0.007.

A similar problem is given at brainly.com/question/13873630

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