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uysha [10]
3 years ago
9

Which is correct to find the value of the coefficient of determination (r2)?

Mathematics
1 answer:
Savatey [412]3 years ago
4 0

<span>The coefficient of determination is presented by R</span>²<span> is mostly used in the analysis of regression where it is the proportion of the variance in the dependent variable that is predictable from the independent variable. The range of values between the predicted scores and the actual scores is between 0 to 1. The closer the value to 1, the greater is the relationship between variables and has lesser errors. For example, if there is an R</span>²<span> of 0.80, then it means that 80% is predictable. R</span>² can be obtained using excel as trendline or with the use of formula.

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A major traffic problem in the Greater Cincinnati area involves traffic attempting to cross the Ohio River from Cincinnati to Ke
yaroslaw [1]

Answer:

a. 0.563 = 56.3% probability that for the next 60 minutes (two time periods) the system will be in the delay state.

b. 0.625 = 62.5% probability that in the long run the traffic will not be in the delay state

Step-by-step explanation:

Question a:

The probability of finding a traffic delay in one period, given a delay in the preceding period, is 0.75.

The system currently is in traffic delay, so for the next time period, 0.75 probability of a traffic delay. If the next period is in a traffic delay, the following period will also have a 0.75 probability of a traffic delay. So

0.75*0.75 = 0.563

0.563 = 56.3% probability that for the next 60 minutes (two time periods) the system will be in the delay state.

b. What is the probability that in the long run the traffic will not be in the delay state? If required, round your answers to three decimal places.

If it doesn't have a delay, 85% probability of continuing without a delay.

If it has a delay, 75% probability of continuing with a delay.

So, for the long run:

x: current state

85% probability of no delay if x is in no delay, 100 - 75 = 25% if x is in delay(1-x). So

0.85x + 0.25(1 - x) = x

0.6x + 0.25 = x

0.4x = 0.25

x = \frac{0.25}{0.4}

x = 0.625

0.625 = 62.5% probability that in the long run the traffic will not be in the delay state

5 0
3 years ago
I need help please. It’s a quiz!
mariarad [96]

charlie and sons- 75 x 100=7500 + 1000= $8500

home dreams- 80 x 100=8000 + 800= $8800

Dream house is more expensive

Brainliest Please!

7 0
1 year ago
Okay heres the photo
11111nata11111 [884]
Anwser = 117


Hope it helped
3 0
2 years ago
If four times a number, added to 3 is divided by the number plus 2, the result is seven halves. Find the number.
dmitriy555 [2]

Answer:

X=-8

Step-by-step explanation:

A number x is multiplied by 4, added to 3, and then divided by x+2, leaving us with 7/2. Or, as an equation:

\frac{4x + 3}{x + 2}  =  \frac{7}{2}

Now, let's cross multiply:

2(4x + 3) = 7(x + 2)

8x + 6 = 7x + 14

And solve:

x + 6 = 14

x =  - 8

4 0
2 years ago
Help me with this math equation please
Helen [10]

Answer:

im not exactly sure how to do this one but i think that you can use pythagoras theorem which is a^2 +b^2=c^2. In the question you can use d^2 +e^2= f^2

4 0
3 years ago
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