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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 sum of two numbers is 100. The different between them is 56. What is the larger number?
m_a_m_a [10]
<h2><u>An</u><u>swer</u><u>:</u><u>-</u></h2>

\pink{\bigstar} The larger number is \large\leadsto\boxed{\tt\purple{78}}

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

<h3>• <u>Given</u><u>:</u><u>-</u></h3>

  • Sum of two numbers is 100.

  • Difference between the numbers is 56.

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

<h3>• <u>To</u><u> </u><u>Find</u><u>:</u><u>-</u></h3>

  • The larger number = ?

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

<h3>• <u>Solut</u><u>ion</u><u>:</u><u>-</u></h3>

Let the two numbers be 'x' and 'y' respectively.

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

<u>According to the question:-</u>

✯ Sum of two numbers is 100.

➪ \sf x + y = 100 \dashrightarrow\bold\red{[equation \: 1]}

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

Also,

✯ Difference between the numbers is 56.

➪ \sf x - y = 100 \dashrightarrow\bold\red{[equation \: 2]}

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

• <u>Adding</u><u> </u><u>eq</u><u>uation</u><u> </u><u>[</u><u>1</u><u>]</u><u> </u><u>a</u><u>nd</u><u> </u><u>equat</u><u>ion</u><u> [</u><u>2</u><u>]</u><u>:</u><u>-</u>

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ \sf (x + y) + (x - y) = 100 + 56

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ \sf x + y + x - y = 156

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ \sf 2x = 156

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ \sf x = \dfrac{156}{2}

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

★ \large{\bold\red{x = 78}}

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

• <u>Subst</u><u>ituting</u><u> </u><u>the</u><u> </u><u>va</u><u>lue</u><u> </u><u>of</u><u> </u><u>x</u><u> </u><u>in</u><u> </u><u>equa</u><u>tion</u><u> </u><u>[</u><u>1</u><u>]</u><u>:</u><u>-</u>

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ \sf x + y = 100

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ \sf 78 + y = 100

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

➪ \sf y = 100 - 78

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

★ \large{\bold\red{y = 22}}

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

Therefore, the numbers are 78 and 22.

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

The larger number is 78.

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I believe that 81 is the correct answer
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The zeros are the x-intercepts, which are -2 and 4.

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Find the cardinal number for the given set.
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Answer:

4

Step-by-step explanation:

The cardinality of a set is the number of members in the set. So besides the numbers in between the 18 and 58 you currently have 4.

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3 years ago
Monique sells lemonade at a lemonade stand. The model she uses to predict future
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The answer would be D

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