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2 years ago

I need help for a major grade quiz !!

Mathematics

1 answer:

arsen [322]2 years ago

5 0

Answer: The answer would be D.

Step-by-step explanation: I put down the points then simply reflected it over the y-axis. I did this by using the the opposite of the x number and the same y number. Hope this helps!

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Find the value of x in the triangle. Please show work. Help

Assoli18 [71]

there is no triangle drawn

4 0

2 years ago

In a one-way ANOVA, what is the difference between the among-groups variance MSA and the within-groups variance MSW?

LuckyWell [14K]

Answer:

$MSR=MSA=\frac{SSR}{k-1}$

And $MSE=MSW=\frac{SSE}{N-k}$

The difference is that MSA takes incount the variation between the groups and the grand mean, and the MSW takes in count the variation within groups respect to the mean of each group .

Step-by-step explanation:

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"

If we assume that we have $j$ groups and on each group from $j=1,\dots,j$ we have $n_j$ individuals on each group we can define the following formulas of variation:

$SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2$

$SS_{between=Treatment}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2$

$SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2$

And we have this property

$SST=SS_{between}+SS_{within}=6750+8000=14750$

The degrees of freedom for the numerator on this case is given by $df_{num}=k-1$ where k represent the number of groups.

The degrees of freedom for the denominator on this case is given by $df_{den}=df_{between}=N-k$ .

And the total degrees of freedom would be $df=N-1$

We can find the $MSR=MSA=\frac{SSR}{k-1}$

And $MSE=MSW=\frac{SSE}{N-k}$

The difference is that MSA takes incount the variation between the groups and the grand mean, and the MSW takes in count the variation within groups respect to the mean of each group .

And the we can find the F statistic $F=\frac{MSR}{MSE}=$

8 0

2 years ago

Maria's family has a maple tree and a pine tree in their front yard. The maple tree is 6

ki77a [65]

Answer:

Pine tree is 42 feet tall

Step-by-step explanation:

Since Maple tree is shorter than pine tree, you add 6 to 36 which is 42.

42 Feet

5 0

2 years ago

Alice earned $622.50 in interest on her savings in the bank. Before interest, the account had $12,450. What is the approximate p

Akimi4 [234]

Hi there

To find The interest rate the formula is
R=I÷pt
r interest rate?
I interest earned 622.5
P principle 12450
T time 1 year
So
R=622.5÷(12,450×1)
R=0.05×100=5%

Hope it helps

6 0

2 years ago

In the school store, all markups are 25%. If the store paid $12 for a t-shirt, what is the selling price?

pashok25 [27]

Answer:

$15

Step-by-step explanation:

6 0

2 years ago