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4 years ago

Jen has collected information about the students in her class and the month they were born.

Mathematics

2 answers:

wel4 years ago

4 0

Answer:

It is a relation but not a function.

Step-by-step explanation:

hope this helps

Nezavi [6.7K]4 years ago

3 0

Answer:

it is both a relation and a function

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Another middle schooler (Swimmer 2) swims 24 laps in 20 minutes, what is the unit rate?

prohojiy [21]

Answer:

1.2 laps per minute

Step-by-step explanation:

divide laps/minutes.

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3 years ago

The average weight of a mango, kiwi, peach and banana is 135 grams. The average weight of the mango, kiwi and peach is 120 grams

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3 years ago

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

Anit [1.1K]

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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3 years ago

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nataly862011 [7]

Answer:

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Step-by-step explanation:

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3 years ago

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OverLord2011 [107]

Answer:

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Step-by-step explanation:

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