All categories

3 years ago

What is 3.00 - 2.50 explain your work

Mathematics

1 answer:

arsen [322]3 years ago

5 0

Answer:

0.5

Step-by-step explanation:

Subtract 2.5 from 3

You might be interested in

If the coefficient of determination is 0.25 and the sum of squares residual is 180, then what is the value of SSY?

Gennadij [26K]

Answer:

And then $SSY=SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2 =240$

C. 240

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

When we conduct a multiple regression we want to know about the relationship between several independent or predictor variables and a dependent or criterion variable.

If we assume that we have $k$ independent variables and we have $j=1,\dots,j$ individuals, we can define the following formulas of variation:

$SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2$

$SS_{regression}=SS_{model}=\sum_{j=1}^n (\hat y_{j}-\bar y)^2$

$SS_{error}=\sum_{j=1}^n (y_{j}-\hat y_j)^2 =180$

And we have this property

$SST==SSY=SS_{regression}+SS_{error}=SSR+180$

If we solve for SSR we got:

$SSR= SSY-180$ (1)

And we know that the determination coefficient is given by:

$R^2 = \frac{SSR}{SSY}$

We know the value os $R^2= 0.25$ and we can replace SSR in terms of SSY with the equation (1)

$R^2 =0.25= \frac{SSY-180}{SSY}= 1-\frac{180}{SSY}$

And solving SSY we got:

$\frac{180}{SSY}=1-0.25=0.75$

$SSY= \frac{180}{0.75}=240$

And then $SSY=SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2 =240$

C. 240

7 0

3 years ago

Which of the lines graphed has a slope of 3 and a y-intercept of 2?

marshall27 [118]

Answer:

Step-by-step explanation:

I can't really see the graphs very well but it is either A or B.

If you want to find your answer, see which line starts at 2 on. the y line. From there using your finger go up 3 and right 1

3 0

3 years ago

Read 2 more answers

How can I learn to round better in math

love history [14]

I have always followed an easy rule: "five or more raises the score". What it means is if the number is 5 or more, it goes to the next whole. Make sense?

3 0

3 years ago

Read 2 more answers

Can somebody help me please

77julia77 [94]

Answer:

sdfgsdhvdert

fghjkkl

fghj

fghjk

gfgjuii

3 0

3 years ago

Help pleaseeeeeeeeeeeeee

marin [14]

Answer:

-2(9+32n)

Step-by-step explanation:

Both the 18 and 64 n are negative, and that is the only answer choice that results in two negative numbers.

4 0

3 years ago

Read 2 more answers