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vodka [1.7K]
3 years ago
10

You conducted a regression analysis between Amount of Wealth in society (x) and the Stock Market Value (y) and the study yielded

the following results. The r = 0.5, the Y intercept when x = 0 is 42, the slope of the regression line is 3. Using problem 1.4 you conducted further analysis and found out that the r = 0.80.
What is the R-Squared and what does it say about the previous regression you conducted?

a. The R-squared is 0.64 and it means that the independent value explains 64% of the dependent value in the simple regression analysis
b. The R-squared is 1.6 and it means that I am 160% sure the regression is correct
c. The R-squared is 1.6 and it means that 160% of the variation in the stock market can be explained by the variation in the Wealth of Society
d. The R-squared is 1.6 and it means that 160% of the variation in the dependent value (y) can be explained by the variation in the independent value (x)
e. The R-squared is 0.64 and it means that the dependent value explains 64% of the independent value in the simple regression analysis
Mathematics
1 answer:
Aliun [14]3 years ago
8 0

Answer:

E IS THE CORRECT ANSWER

The R-squared is 0.64 and it means that the dependent value explains 64% of the independent value in the simple regression analysis

Step-by-step explanation:

R-Squared value is a very important indicator in a regression analysis.

What does it measure?

It measures how close to the line of best fit are the data points. How good the fitted line is can be indicated by the value of the r-squared.

The maximum value it can take is 1 and at this value, there is a direct and complete relationship between the independent variable x and the dependent variable y. The value 1 represents an 100% relationship between both parties.

The r-squared has a value of between 0 and 100%. The closer to 100, the better the model while the closer to 100, the more faulty the model is. In fact, a value of 0 indicates no relationship at all between the dependent and the independent variable.

With an R-squared value of 0.64, the regression model works above average to explain that the dependent variable explains 64% of the independent value in the simple regression analysis.

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Which expression has a value that is equivalent to 5n + 13 when n=−5 ?
Orlov [11]
5(-5)+13=-25+13=-12
the answer would be 4n+8
hope this helps!
8 0
3 years ago
Read 2 more answers
Use the Midpoint Rule with n = 5 to estimate the volume V obtained by rotating about the y-axis the region under the curve y = 1
velikii [3]

Using the shell method, the volume is given exactly by the definite integral,

2\pi\displaystyle\int_0^1x(1+9x^3)\,\mathrm dx

Splitting up the interval [0, 1] into 5 subintervals gives the partition,

[0, 1/5], [1/5, 2/5], [2/5, 3/5], [3/5, 4/5], [4/5, 5]

with left and right endpoints, respectively, for the i-th subinterval

\ell_i=\dfrac{i-1}5

r_i=\dfrac i5

where 1\le i\le5. The midpoint of each subinterval is

m_i=\dfrac{\ell_i+r_i}2=\dfrac{2i-1}{10}

Then the Riemann sum approximating the integral above is

2\pi\displaystyle\sum_{i=1}^5m_i(1+9{m_i}^3)\frac{1-0}5

\dfrac{2\pi}5\displaystyle\sum_{i=1}^5\left(\frac{2i-1}{10}+9\left(\frac{2i-1}{10}\right)^4\right)

\dfrac{2\pi}{5\cdot10^4}\displaystyle\sum_{i=1}^5\left(16i^4-32i^3+24i^2+1992i-999\right)=\frac{112,021\pi}{25,000}\approx\boxed{14.08}

(compare to the actual value of the integral of about 14.45)

3 0
3 years ago
Please help me out? thank you.
anzhelika [568]
It’s the fourth answer
4 0
2 years ago
How would I set up question one?
Darina [25.2K]

A straight line is 180 degrees:

25x + 8 + 9x + 2 = 180

Combine like terms:

34x + 10 = 180

Subtract 10 from both sides:

34x = 170

Divide both sides by 34:

X = 5

Now solve the smaller angle:

9x + 2 = 9(5) + 2 = 45 + 2 = 47

They angle with the y is a vertical angle to 47 so needs to also equal 47:

7y + 5 = 47

Subtract 5 from both sides:

7y = 42

Divide both sides by 7:

Y = 6

Answer: x = 5, y = 6

8 0
3 years ago
Whitney has a total of 30 cupcakes for her guests. the function rule, 30 ÷ x where x is the number of guests, can be used to fin
GREYUIT [131]
10 because 30 divided by 3 it will equal 10
5 0
3 years ago
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