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Volgvan
3 years ago
11

Suppose we have collected times, in minutes, that it takes volunteers to complete a set of pencil and paper mazes. Volunteers ar

e randomly assigned to one of two groups. Group 1 watch a 5 minute video explaining good strategies for completing the mazes. Group 2 watch a 5 minute video of other people successfully completing the mazes, but with no explanation given.Researchers are interested in testing against the null hypothesis that there is no difference in population mean times that it takes people to complete mazes after watching either type of video.There are the summary statistics after collecting data. Note that the sample sizes differ, because some subjects did not follow instructions correctly and so they were not included in the analysis.x1 = 11.98, x2 = 9.15s1 = 8.69, s2 = 7.75n1 = 43, n2 = 52a. Is this an experimental or observational study?
Mathematics
1 answer:
Leto [7]3 years ago
3 0

Answer:

Is an experimental study

Step-by-step explanation:

In an observational study you don't control any aspect of the investigation you just observe the variables that you determined since the beginning without any intervention.

In this case you are controlling who sees one or the other video, then you are controlling one of the variables that is the type of video each group sees and because of this it is an experimental study. Researchers designed an experiment to prove the null hypothesis they had.

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HELP ASAP!!! I AM VERY VERY VERY STUCK AND CONFUSED!!
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Answer:

A

Step-by-step explanation:

To find your answer, divide the price of the ink by how many pages it will print. In this case, option A gives you the best value at $0.08 per page.

4 0
4 years ago
44-4y=20x <br> Solve equation for Y
ioda

Answer:

44 - 4y = 20x \\  4y = 44 - 20x \\ 4y = 24x \\  \\ y =  \frac{24x}{4}  \\  \\ y = 6x

I hope I helped you^_^

4 0
3 years ago
Read 2 more answers
How to find vertical and horizontal asymptotes of polynomials?
guajiro [1.7K]
Vertical asymptotes are when y tends to infinity, which in other words means you need a fraction where you're dividing by zero. So to find the vertical asymptotes, solve the denominator of the fraction and the solutions are the asymptotes since that is where it will be dividing by zero.

Horizontal asymptotes are the opposite and is where x tends to infinity -- This can be done by dividing through with the xs still there, since you are effectively just looking at multiples of infinity and infinity squared and so on. When you have an x to the power you can forget about all the other x's on the same half of the fraction, since infinity squared is infinitely bigger than infinity - yes it's abstract and a bit stupid I know.
If the degree of the polynomial on the denominator is larger than the numerator, there is an asymptote at y=0 (since the bottom becomes infinitely larger than the top). If it is lower than the numerator, you have to divide through by long division and you end up with an oblique asymptote i.e. an asymptote where the dotted line would follow a linear equation e.g. y=x

For example
f(x)= \frac{6x^2-3x+4}{2x^2-8}

The vertical asymptote can be found by solving 2x^2-8=0 i.e. x=+-2 so our vertical asymptotes are at 2 and -2.

The horizontal asymptote, think of all the x's as infinity. SInce there are x^2s, we dont need to worry about the numbers or the other x's
Therefore we are left with 6x^2/2x^2, which gives us 3. Therefore our horizontal asymptote would be at y=3.
7 0
3 years ago
The width of a rectangle is 6 kilometers less than twice its length. if the area of the rectangle is 176 square kilometers, find
trasher [3.6K]
Let w and 2w-6 be the width and length, respectively. Then:
w(2w-6)=176
2w²-6w-176=0
(2w+16)(w-11 )=0
w=-16/2 or 11
If the width is 11 km, then the length is 16 km
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5 0
4 years ago
In the diagram, the measure of angle 3 is 105°.
Sholpan [36]

Answer:

<6

Step-by-step explanation: The total should be 180 and its common sense to know that measure <5 is not 105 degrees

6 0
2 years ago
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