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Aliun [14]
3 years ago
7

A school psychologist wants to test the effectiveness of a new method of teaching Art. She recruits 600 second-grade students an

d randomly divides them into two groups. Group 1 is taught by means of the new method, while Group 2 is taught via traditional methods. The same teacher is assigned to teach both groups. At the end of the year, an achievement test is administered and the results of the two groups compared. What is the response variable in this experiment?
a. The students’ ability in Art
b. The score of Group 1 on the achievement test
c. The score on the achievement test.
d. The score of Group 2 on the achievement test
Mathematics
1 answer:
yuradex [85]3 years ago
3 0

Answer:

c. The score on the achievement test of both groups.

Step-by-step explanation:

A school psychologist recruits 600 second-grade students and randomly divides them into two groups.

Group 1 is taught by means of the new method, while Group 2 is taught via traditional methods.

We have to find the response variable. A response variable is the outcome variable or dependent variable in the experiment.

Here this is - The scores on the achievement tests of both group 1 and group 2.

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I dont understand how to simplify an expression with exponents
Mashutka [201]

Answer:

3^4

Step-by-step explanation:

Simplifying an expression with expression with exponents:

If they are dividing, we keep the base and subtract the exponents. For example:

\frac{a^x}{a^y}=a^{x-y}

In this question:

\frac{3^2}{3^{-2}}=3^{2-(-2)}=3^{2+2}=3^4

8 0
1 year ago
Find the value of x,
Gekata [30.6K]

Answer: x = -7

Concept:

From the given graph, we can see that it is an isosceles triangle since the two base angles are congruent.

In geometry, an isosceles triangle is a triangle that has two sides of equal length.

If you are still confused, you may refer to the attachment below for a graphical explanation or tell me.

Solve:

<u>Given information</u>

First Side = 7

Second Side = x + 14

<u>Given expression deducted from the definition of an isosceles triangle</u>

Second Side = First Side

<u>Substitute values into the expression</u>

x + 14 = 7

<u>Subtract 14 on both sides</u>

x + 14 - 14 = 7 - 14

\boxed{x=-7}

Hope this helps!! :)

Please let me know if you have any questions

5 0
2 years ago
Apple launches an ad campaign for iPhone 12. Managers want to know what is the % of social media mentions that have positive rea
Orlov [11]

Answer:

social media mentions do managers at Apple need to collect, if they want to get a margin of error of 2%

Sample size 'n' = 625

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given data Apple launches an ad campaign for iPhone 12

Managers want to know what is the % of social media mentions that have positive reactions to the new ad campaign

probability of positive reactions p = 1/2

Probability of negative reactions q = 1-p = 1/2

we know that \sqrt{p(1-p}\leq \frac{1}{2}

<u><em>Step(ii):</em></u>-

Given margin of error  = 2 % =0.02

The margin of error is determined by

          M.E = \frac{\sqrt{p(1-p} }{\sqrt{n} }

         0.02 = \frac{\frac{1}{2}  }{\sqrt{n} }

        \sqrt{n} =\frac{1}{2 X0.02}

        √n = 25

squaring on both sides, we get

       n = 625

8 0
3 years ago
Caleb placed 3 yellow balls and 4 red balls in a row.
qwelly [4]

Answer:

I think it's C)144. because I think it's C

6 0
2 years ago
What is the inverse of the function y=3e^(4x+1)
Sergeeva-Olga [200]
To find the inverse interchange the variables and solve for y

f^-1 (x) = - 1/4 + in(x)/4 - in(3)/4
6 0
3 years ago
Read 2 more answers
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