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3 years ago

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Which characteristic of a data set makes a linear regression model unreasonable?

2 answers:

LiRa [457]3 years ago

6 0

Which characteristic of a data set makes a linear regression model unreasonable?

Answer: A correlation coefficient close to zero makes a linear regression model unreasonable.

If the correlation between the two variable is close to zero, we can not expect one variable explaining the variation in other variable. For a linear regression model to be reasonable, the most important check is to see whether the two variables are correlated. If there is correlation between the two variable, we can think of regression analysis and if there is no correlation between the two variable, it does not make sense to apply regression analysis.

Therefore, if the correlation coefficient is close to zero, the linear regression model would be unreasonable.

Kryger [21]3 years ago

5 0

Answer:

b)a correlation coefficient close to 0

Step-by-step explanation:

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Use the information below to complete the problem: p(x) = (1)/(x + 1)

bija089 [108]

Given:

The functions are:

$p(x)=\dfrac{1}{x+1}$

$q(x)=\dfrac{1}{x-1}$

To find:

The rational expression for $p(x)-q(x)$ .

Solution:

We have,

$p(x)=\dfrac{1}{x+1}$

$q(x)=\dfrac{1}{x-1}$

Now,

$p(x)-q(x)=\dfrac{1}{x+1}-\dfrac{1}{x-1}$

$p(x)-q(x)=\dfrac{(x-1)-(x+1)}{(x+1)(x-1)}$

$p(x)-q(x)=\dfrac{x-1-x-1}{x^2-1^2}$ $[\because a^2-b^2=(a-b)(a+b)]$

$p(x)-q(x)=\dfrac{-2}{x^2-1}$

Therefore, the required rational expression for $p(x)-q(x)$ is $\dfrac{-2}{x^2-1}$ .

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2 years ago

. The table shows the distance a truck

nirvana33 [79]

Answer:

see photo attached for detailed analysis.

5 0

2 years ago

Find the simple interest earned to the nearest cent for each principal, interest rate, and time. $300, 5%, 2 years

Olegator [25]

Answer:

<u><em>$330</em></u>

Step-by-step explanation:

Since it is simple interest. You would do 300*.05 which would be 15 than since it is simple interest you would do it again and get 15 again. Therefore you would have $330.

6 0

3 years ago

How many terms are in this expression?<br> b+8+2a

Grace [21]

Answer:

There are three terms in this expression.

Step-by-step explanation:

b is your <u>first term</u>

8 is your <u>second term</u>

Even though the next term is 2a it is still a single term making it your <u>third and final term.</u>

5 0

3 years ago

A walkway is being installed around a rectangular playground. The playground is 30 feet by 12 feet, and the total area of the pl

worty [1.4K]

Answer:

10.3

Step-by-step explanation:

From these question, we can illustrate the playground has a small rectangle with 30x12ft

the walkway is around it with an area of 1288ft²

the playground area = 30 x 12 = 360ft²

the length dimension of the walkway is 30+y+y( these is because the walkway is round the playground in two sides) = 30 +2y

the breadth dimension of the walkway is 12+y+y ( these is because the walkway is round the playground in two sides) = 12+2y

Area of walkway = (30+2y)(12+2y)= 30(12+2y)+2y(12+2y) = 360+60y+24y+4y²= 360+84y+4y²

The total area = 1288ft²

The total area = area of walkway - area of playground

1288ft² = 360+84y+4y² - 360

choose like terms

1288 = 360-360+84y+4y²

1288 = 84y+4y²

divide by 4

322= 21y+y²

y²+21y-322 =0

using quadratic formula

x= (-b±√b²-4ac)/2a = {-21±√21²-4(1)(-322)}/2x1 = {-21±√441+1288}/2x1 = -21±√1729/2

-21+√1729/2 -21-√1729/2

√1729 = 41.5812457726

-21+√1729/2 -21-√1729/2

{-21+41.5812457726}/2 {-21-41.5812457726}/2

20.5812457726/2 -62.5812457726/2

10.2906228863 -31.2906228863

we disregard the negative sign

our width is 10.2906228863 ≅10.3

4 0

3 years ago

Read 2 more answers