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Fiesta28 [93]
4 years ago
10

Give an example of a research experiment, indicating the independent and dependent variables, as well as the experimental and th

e control groups.
Mathematics
1 answer:
Vitek1552 [10]4 years ago
8 0

Answer:

In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score. You want to compare brands of paper towels, to see which holds the most liquid.

hopes it helps

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A tree is 14.5 meters tall. What is its height in feet ? Use the following conversion 1 meter is 3.3
Scilla [17]

Answer:

47.57218 feet

Step-by-step explanation:

Converted on Googers

4 0
3 years ago
The National Association of Realtors reported that 26% of home buyers in the state of Florida are foreigners. A random sample of
Paladinen [302]

Answer:

Hypothesis

H_0: \pi=0.26\\\\H_a: \pi\neq 0.26

P-value = 0.078

Conclusion: The null hypothesis is rejected. There is enough evidence to claim that the proportion of foreigners home buyers is different from 26%.

Step-by-step explanation:

We will perform a hypothesis test on a proportion.

The null hypothesis states that 26% of home buyers are foreigners.

The alternative hypothesis states that the proportion is different than 26%.

H_0: \pi=0.26\\\\H_a: \pi\neq 0.26

The significance level is α=0.10.

The sample proportion is:

p=x/N=20/110=0.182

The standard error is:

\sigma_p=\sqrt{\frac{\pi(1-\pi)}{n} }=\sqrt{\frac{0.26*0.74}{110}} =\sqrt{\frac{0.1924}{110} } =\sqrt{0.00175} \\\\\sigma_p=0.042

Then, we can calculate the z-statistic as:

z=\frac{p-\pi+0.5/N}{\sigma_p} =\frac{0.182-0.26+0.004}{0.042}=- \frac{0.074}{0.042}= -1.762

The P-value can be calculated as:

P-value=2*P(z

The P-value is smaller than the significance level, so the effect is significant.

The null hypothesis is rejected. There is enough evidence to claim that the proportion of foreigners home buyers is different from 26%.

5 0
4 years ago
Solve the system of equations by substitution.<br><br> y = 4x -1<br><br> 2x + 2y = 3
gtnhenbr [62]

Answer:

(0.5, 1)

Step-by-step explanation:

Using Desmos Graphing calculator, I put both of these equations in, found where the lines intersected, and saw that the ordered pair I was left with was:

(0.5, 1)

8 0
3 years ago
Read 2 more answers
What advantages does the graphing calculator have when it comes to finding the solution to a system of linear equations? Explain
Mashcka [7]
For this case you have the following advantages:
 
 1)
you can see the graph of both equations

 2) you can see where the equations intersect

 3) the point of intersection represents the solution to the system of equations.

 4) You can solve the problem in much less time than doing it by hand

 5) You can find very accurate solutions.
4 0
3 years ago
Read 2 more answers
How do you find the area of the sector of the circle with a radius of 4in and a central angle θ of pi/3? Please explain procedur
Lena [83]

It is generally useful to use the formula. The procedure is to substitute the given values for the variables in the formula, then do the arithmetic.

... A = (1/2)r²·θ . . . . r is the radius, θ is the central angle in radians

Put the numbers in ...

... A = (1/2)(4 in)²·(π/3)

... A = 8π/3 in² ≈ 8.37758 in²

6 0
3 years ago
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