1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
monitta
3 years ago
7

Several high schools participated in a study to evaluate the effectiveness of a new computer-based math curriculum. In all these

high schools combined, there were twelve 24-student sections of freshman algebra available for the study. The computer-based curriculum was assigned to six of the sections, chosen at random from the twelve sections. The standard curriculum was assigned to the remaining six sections. At the end of the term, a standard math achievement test was given to each of the 24 students in each section.
Required:
a. Is this study experimental, observational, or mixed experimental and observational? Why?
b. Identify important factors, factor levels, and/or factor-level combinations.
c. Classify these factors as within- or between-subjects
d. What’s the dependent measures?
e. What is the basic experiment unit of study?
Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
4 0

Step-by-step explanation:

a

the study is experimental as we do not just observe students performance. 2 techniques were also randomly assigned. there is control over teaching techniques and performance is also observed.

b.

these are the 3 factors: high school, instructions type, scores.

high school has 2 levels. level 1, is 3 high school. level 2: each high school has 4 sections and these 4 have 24 students.

instructions type: 1 level divided into standard and computer based.

scores: 0 ( no level)

c.

high school has between subject combination since there are 3 schools and 4 sections.

instructions type has between too. since there are two different types.

we have 24 students in each section which are within subjects.

d.

score on test is dependent variable

e.

student is basic experimental unit.

You might be interested in
HELP ME PLZ IN UNDER 10 MINUTES!!! WILL GIVE BRAINLIEST AND RATE!! 1.Simplify. 10y(3x – 7z) IS IT: 30xy – 70yz, 103xy – 107yz, 3
hram777 [196]
1. 30yx - 70 yz 
2. 24m+30
3. 8m+88
4. 17p+24pr
7 0
3 years ago
Read 2 more answers
Pleaseeeee helpppppppppppppppppppppppp
natta225 [31]
I think it’s 309 cm because each side is 1 cm, there’s 3 sides, and 103 triangles. so 103x3=309 sides which means 309 cm
5 0
3 years ago
The curve y = |x|/ 5 − x2 is called a bullet-nose curve. find an equation of the tangent line to this curve at the point (2, 2).
diamong [38]
We have the following curve:

y=\frac{\left | x \right |}{5-x^2}

So we need to find <span>an equation of the tangent line to this curve at the point (2,2). So let's find out if this point, in fact, belongs to the curve:

</span>If \ x=2 \\ \\ y=\frac{\left | 2 \right |}{5-2^2}=\frac{\left | 2 \right |}{5-4}=2. 
<span>
We also know that:

</span>\left | x \right |= \left \{ {{x \ if \ x \ \geq 0} \atop {-x \ if \ x\ \textless \ 0}} \right.<span>

Given that the point is:

</span>(2,2)\ that \ is: \\ x=2\ \textgreater \ 0

Then we will say that:

\left | x \right |=x

Therefore:

y=\frac{x}{5-x^2}

Computing the derivative:

y=\frac{x}{5-x^2} \\  \frac{dy}{dx}= \frac{(1)(5-x^2)-(-2x)x}{(5-x^2)^2}=\frac{5+x^2}{(5-x^2)^2}

So the derivative solved for x=2 is in fact the slope of the line at the point (2,2), then:

\frac{dy}{dx} |_{x=2}=\frac{5+x^2}{(5-x^2)^2}|_{x=2}=\frac{5+2^2}{(5-2^2)^2}=9 \\ \\ \therefore m=\frac{dy}{dx} |_{x=2}=9

Finally, the tangent line is:

y-y_1=m(x-x_1) \\ \therefore y-2=9(x-2) \\ \therefore \boxed{y=9x-16}

<em>This is shown in the figure below.</em><span>
</span>

8 0
3 years ago
Help me solve this.... ​
rodikova [14]

Answer:

1. Solution,\\Let~x=0.272727......\\Then, 100x = 27.272727.....\\Now,\\100x-x = 27.272727..... - 0.27272727..... = 27.\\or, 99x = 27\\or, x = \frac{27}{99} = \frac{3}{11}\\Thus,~\frac{3}{11} =0.27272727......\\

2. (27)^\frac{2}{3}.(125)^\frac{1}{3}\\= (3^3)^\frac{2}{3}.(5^3)^\frac{1}{3}\\=(3^2)(5)\\=45.

3. Solution,\\Here, \frac{1}{5} = 0.2\\\frac{1}{2} = 0.5\\Now, ~Irrational~ numbers~ between~ 0.2 ~and~ 0.5 ~are~ 0.2122275647.......~and~0.467858930.......\\

You can write any numbers between 0.2 and 0.5 which follow irregular patterns like this.

OR\\Examples~of~such~irrational~numbers~are~5+\sqrt{7}~ and~5-\sqrt{7} .

4. Solution,\\x^2+y^2 = (x+y)^2-2xy=5^2-2(10) = 25-20=5.\\5.~ If~x=-3~and~y=-2~are~the~solutions~of~the~equation~2x-3y=k,~then,\\2(-3)-3(-2)=k\\or, k = -6+6\\or, k = 0

4 0
3 years ago
What is the midpoint of 16 1/4 above sea level and 12 3/4 below sea level
anzhelika [568]

Answer: 1 3/4 above sea level

the midpoint of 16 1/4 above sea level and 12 3/4 below sea level is 1 3/4 above sea level

Step-by-step explanation:

I made a line graph and brought each side closer and closer until i stopped at the middle point

7 0
3 years ago
Other questions:
  • Write a expression that is equivalent of 4+3(5+x)
    6·1 answer
  • How do I do this again ? I totally forgot ‍♀️
    7·1 answer
  • What is a word problem for this equation -2(-3.5)
    6·1 answer
  • HELP PLEASE BE QUICK
    10·2 answers
  • 10 times as much as what is 1/10 of 900
    14·1 answer
  • What is the mixed fraction to this answer? 4 1/2+ 5 2/3
    14·2 answers
  • ABCD is a rectangle. Find the length of segment AC
    12·1 answer
  • Pls help me on this question
    10·1 answer
  • The diagram shows the graph of y = x/2 + 2/x, for 0 &lt; x ≤ 8
    6·1 answer
  • a construction company builds a new rail line from town a to town b they complete 1 1/4 miles in first week of work and 1 and 2/
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!