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Brut [27]
3 years ago
14

Write the word or phrase that best completes each statement or answers the question.

Mathematics
1 answer:
aniked [119]3 years ago
5 0
I believe that the answer is A
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Question 1
xxTIMURxx [149]

Answer:

The teacher randomly divides the class into two groups. One of the groups receives computer-based instruction and the other group receives traditional instruction without computers. After instruction, each student takes a test and the teacher wants to compare the test scores of the two groups.

Step-by-step explanation:

A two sample t-test is used to compared the means of two samples who were exposed to different scenarios and therefore, it helps us to see the difference between these two samples.

In this problem, the teacher is experimenting with a new computer-based instruction. To be able to use the two-sample t-test she would have to have two randomly assigned samples and expose each of these two samples to different scenarios (one would receive a traditional instruction and the other one would receive a computer instruction), and finally she would need to compare the scores in both samples.

Therefore, the correct answer would be b) The teacher randomly divides the class into two groups. One of the groups receives computer-based instruction and the other group receives traditional instruction without computers. After instruction, each student takes a test and the teacher wants to compare the test scores of the two groups.

<u>*Option A is incorrect</u> because the students are only exposed to the lesson using a computer program and therefore they aren't exposed to different scenarios.

<u>*Option C is incorrect</u> because although in this case the teacher uses both traditional and computer methods, there are not two different samples and she only gets the opinion of the students which is not an exact method of getting information on the effectiveness of the computer based method.

3 0
3 years ago
X²-9\x-3 explain why x doesnt = 3
iVinArrow [24]
\dfrac{x^2-9}{x-3}

For x=3, the denominator is equal to 0 and you can't divide by 0.
5 0
3 years ago
The weight of an object on the moon is of its weight on Earth. Write 1/6 as a decimal.​
xxTIMURxx [149]

Answer:

1/6 as an decimal would be, 0.1666 Continued

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A line connecting a vertex of a scalene triangle with the midpoint of the opposite side is the
Irina18 [472]
The line would be called the median. The definition of '<span>A line connecting a vertex of a scalene triangle with the midpoint of the opposite side' pertains to the median. There are three medians that connect the scalene triangle. </span>
4 0
2 years ago
What is the approximate length of arc QR? Round to the nearest tenth of a centimeter.
NeX [460]

Step-by-step explanation:

theta = 180 - 123 = 57 degree

arc length = 2 * pi * R * ( theta / 360)

= 2 * pi * R * ( 57 / 360)

= 0.994R cm

8 0
2 years ago
Read 2 more answers
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