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KengaRu [80]
3 years ago
8

Suppose a classroom teacher wants to measure whether offering candy as a reward will increase the number of times that a student

raises his/her hand to answer a question in class. A study yields the following data.Row C1 C21 9 122 7 83 15 144 10 115 8 7If column 1 is the number of times that a student raised their hand to answer a question before the candy reward was implemented, and column 2 is the number of times that the same students raised their hands to answer questions after the candy reward was implemented, which of the following is the appropriate inference method to analyze these data?A) Inference for regressionB) Two independent samples C) Matched pairs
Mathematics
1 answer:
ahrayia [7]3 years ago
5 0

Answer:

C) Matched pairs

Step-by-step explanation:

Matched samples (also called matched pairs, paired samples or dependent samples) is a type of sampling that involves pairing participants that share every characteristic except for the one under study. The paired participants could be same individuals studied at different time such as:

  1. The study of same participants before and after an interference.
  2. The study of the same participants at two different interference.
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The actual distance between two cities is 135 km. The map scale is 1cm: 100 km. Find the map distance.
defon

Answer:

1.35cm

Step-by-step explanation:

Given the scale of the map

1cm = 100km

For 135km;

x cm  = 135 km

Divide both equations

1/x = 100/135

100x = 135

x = 135/100

x = 1.35cm

Hence the map distance will be 1.35cm

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2 years ago
How can i use decimal models to subtract decimals??
Aleonysh [2.5K]
I think a decimal number line would help with subtracting and adding
4 0
3 years ago
(07.02) Simplify (3x − 5) − (4x + 6). (1 point) −x −11 x − 11 −x + 11 x + 11
swat32
(3x − 5) − (4x + 6)
to simplify combine like terms
= (3x - 4x) + (-5 - 6)
= -1x - 11 (same as -x - 11)

ANSWER: -1x - 11 (first choice)

Hope this helps! :)
3 0
3 years ago
JT = 2x + 9,<br> CJ = 6x + 4, and<br> CT = 37,<br> Find JT.
Katyanochek1 [597]

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Step-by-step explanation:

3 0
3 years ago
Someone know how to do this?: 6x2+18x=0
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The answer to the question is: Yes.

Explanation:  It can be solved by following exactly the same procedures
that solved the other two questions that you posted within the past 15 minutes.

Since I'm here already, here is the solution to this one:

6x² + 18x = 0

Divide each side of the equation by 6 :

x² + 3x = 0

Factor the left side:

x(x+ 3) = 0

This statement is true if x=0 or if x=3.

The solution to this one is even the same as the solution to the last one you posted.
You really ought to take a break, go back, review the solutions you've been given,
and try to solve a few on your own.
4 0
3 years ago
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