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melisa1 [442]
2 years ago
12

A teacher wants to know if burning a scented candle affects students’ performance on pop quizzes. In the experiment, there will

be a treatment group and a control group each taking their quizzes in a room that either does or does not have a scented candle burning. On a randomly chosen day, the first 15 students who arrive to class will be the control group while the last 15 students who arrive will be the treatment group. Which statement best describes the composition of the groups? The characteristics of the two groups should be roughly equivalent because both groups have 15 students. The characteristics of the two groups should be roughly equivalent because the students were split into groups on a randomly chosen day. The characteristics of the two groups might not be roughly equivalent because the students were not labeled and given a random number to place them in one of the groups. The characteristics of the two groups might not be roughly equivalent because students who arrive around the same time might be friends and have similar preferences for scented candles.
Mathematics
1 answer:
ArbitrLikvidat [17]2 years ago
6 0

The characteristics of the two groups might not be roughly equivalent because the students were not labeled and number wasn't given.

<h3>What is Composition? </h3>

This is the process which involves combining different parts in other to form a whole.

The student were not labeled and number wasn't given to place them in one of the groups will best describe their roughly equivalent composition hence option C was chosen.

Read more about Composition here brainly.com/question/9464122

#SPJ1

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Please help me out!​
seropon [69]

Answer:

Second option

Third option

Fourth option

Step-by-step explanation:

We have the following quadratic function

f(x) =(x-1)(x+7)

Use the distributive property to multiply the expression

f(x) =x^2+7x-x-7

f(x) =x^2+6x-7

For a function of the form f (x) = ax ^ 2 + bx + c the x coordinate of the vertex is:

x =-\frac{b}{2a}

Then in this case the coordinate of the vertex is:

x =-\frac{6}{2(1)}

x =-3

To obtain the y coordinate of the vertex we evaluate the function at x = -3

f(-3) =(-3)^2+6(-3)-7

f(-3) =9-18-7

f(-3) =-16

Then the vertex is:  (-3, -16)

We can see in the graph that the zeros of the function are x=1 and x=-7

Then the function is decreasing from -∞ to -3 and then it is increasing from -3 to ∞

The function is positive for x and x> 1

The correct answers are:

Second option

Third option

Fourth option

7 0
3 years ago
What is the answer to 9x(6+x)
Anna11 [10]

54x + x \\  \\ (constributive \: property)
5 0
3 years ago
Samaria has 6 more than three times as many pieces of candy as sydney. samaria has 36 pieces of candy. how many does sydney have
lesya [120]

For this case we have:

x: Number of candies that Sydney has

The equation to find the amount of Sydney sweets is given by:

3x + 6 = 36

We want to clear x:

3x = 36-63x = 30

x = \frac{30}{3}

x = 10

So, Sydney has 10 candies

Answer:

Sydney has 10 candies


4 0
3 years ago
Read 2 more answers
Lesson Check (4.MD.C.7)
vredina [299]
The measure of Zx is 4
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3 years ago
Could mud wrestling be the cause of a rash contracted by Washington State University students in the spring of 1992? Physicians
Daniel [21]
Thank you for posting your question here at brainly. Feel free to ask more questions.   
<span>
The best and most correct answer among the choices provided by the question is </span><span>A. Between 0.05 and 0.01 </span> .    
      <span>
Hope my answer would be a great help for you.  </span>
7 0
3 years ago
Read 2 more answers
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