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mars1129 [50]
2 years ago
15

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.
Why is randomization important when setting up an experiment to answer this research question?

to ensure that both groups have a nice mix of students
to ensure that the two groups have the same number of students
to ensure that both groups are roughly equivalent regarding students’ preparedness, anxiety levels, and study skills
to ensure that the rooms for both groups are approximately the same regarding time of day, temperature, sound control, and lighting
Mathematics
1 answer:
Tresset [83]2 years ago
3 0

Randomization is important to ensure that both groups are roughly equivalent regarding students’ preparedness, anxiety levels, and study skills.

<h3>What is randomization in an experiment?</h3>

Randomization is when subjects in an experiment are placed in either the control group or the treatment group without any structure. They are placed in either groups randomly. The purpose of randomization is to ensure that subjects in either group are homogenous.

To learn more about randomization, please check: brainly.com/question/20629933

#SPJ1

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Ok so this... is confusing the hell outta me any help? <br>​
kap26 [50]

Answer:

y = 24

Step-by-step explanation:

The sum of the angles of a triangle is 180

A+B+C = 180

ABC = 60

We know 2x-4 = 60

2x -4+4 = 60+4

2x = 64

x = 64/2 = 32

A = 3x = 3(32) = 962x-4 = 60

B = 60

Using the first equation

96+ 60 +y = 180

156 +y =180

y = 180-156

y = 24

8 0
3 years ago
Lines l and m intersect at point p and are perpendicular. if a point q is reflected across l and then across m, what transformat
artcher [175]
Rotating 180 degrees about the point p. 

If they are perpendicular reflecting across each one will have the same effect as if the point was rotated 180 degrees about the certain point.
7 0
3 years ago
What Is -0.75-(-2/50)+0.4(-3/4)? Explain and answer the question please
lilavasa [31]
The answer is -1.01
I first changed the signs of the ones i could. So <span>-0.75+(2/50)+0.4(-3/4)
Then i multiplied the 0.4*-3/4 which equals -0.3
So you are left with </span><span>-0.75+(2/50)-0.3
2/50 is equal to 0.04 so now it is </span> -0.75+0.04-0.3 and the rest is simple math. Which equals -1.01
3 0
3 years ago
What is the graph of the linear inequality y≤−3x+4?
tatiyna

Answer:

It would look like the picture I attached at the bottom.

Step-by-step explanation:

We know that the slope is -3 and the y intercept is (0,4) (plugging in 0 for x will get you that point), and then you can just graph an equation like you normally would, using rise/run to go down 3 units for every one unit you go right, and plugging in easy x values to check your work.

It gets a little tricky because the question then adds the inequality, and we see that y is now less than <em>or equal to </em>the original equation.

Since it is less than, we can shade all the values below the graph.

(Also, you should probably note for future reference that if it was just less than, the shading would look the same while the graph itself would be dotted because the values on the line are nor included in the solution set).

Desmos is a great website to use if you're having trouble graphing in the future :)

5 0
3 years ago
If d varies directly as t and d = 20.5 when t=12 find:
Fed [463]

Answer:

B or c but im sure its B

Step-by-step explanation:

just did this answer!

3 0
2 years ago
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