2 years ago

Draw a number line. Samuel drove 3 miles to get to school. Then, he drove miles to

Mathematics

1 answer:

Dmitriy789 [7]2 years ago

7 0

How many miles did it take to get to the grocery store?

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5 is -20

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Express the set of real numbers between but not including 2 and 5 as follows.

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7. A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The T

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Answer:

Modification has not reduced the number of accidents.

Step-by-step explanation:

$H_0: \mu\geq0\\H_a:\mu$

A B C D E F G H

Before modification 5 7 6 4 8 9 8 10

After modification 3 7 7 0 4 6 8 2

Difference -2 0 1 -4 -4 -3 0 -8

Mean of differences $M_d = \frac{sum}{8}=\frac{2+0-1+4+4+3-0+8}{8}=2.5$

Standard deviation of differences = $\sqrt{\frac{\sum(x-\bar{x})^2}{n}}=2.9277$

Formula of paired t test :

$t=\frac{M_d}{\frac{s}{\sqrt{n}}}\\t=\frac{2.5}{\frac{2.9277}{\sqrt{8}}}\\t = 2.4152$

Df = n-1 = 8-1 =7

$t critical = t_{(df, \alpha)}=t_{7,0.01}=2.998$

t critical> t calculated

So, We failed to reject null hypothesis

Hence modification has not reduced the number of accidents.

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2 years ago

which of the following statements accurately describes a result of a decreasing worker per beneficiary ratio in the Social Secur

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Step-by-step explanation:

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2 years ago

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2-A

3-D

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