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3 years ago

How can I find Vocabulary puzzles

Mathematics

1 answer:

scoundrel [369]3 years ago

8 0

Answer:

what are vocab puzzles

Step-by-step explanation:

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Taking a test i don’t know anything about please help

PilotLPTM [1.2K]

Answer:

See below for answers and explanations

Step-by-step explanation:

Problem 4:

The line of regression is $\hat y = a+bx$ where:

$a=\overline y-b \overline x$

$b=\frac{r*s_y}{s_x}$

We are given that $\overline y=75$ , $s_y=8$ , $\overline x=280$ , $s_x=30$ , and $r=0.60$ , therefore our slope, $b$ , is:

$b=\frac{r*s_y}{s_x}$

$b=\frac{(0.60)(8)}{30}$

$b=0.16$

Therefore, the slope of the regression line is 0.16, which can be used along with the values of $\overline y$ and $\overline x$ to find the constant $a$ :

$a=\overline y-b \overline x$

$a=75-(0.16)(280)$

$a=30.2$

This means our final regression line is $\hat y = 30.2 + 0.16x$

Problem 5:

The slope, $b=0.16$ , means that for every 1 point earned for a student's pre-exam total, their final exam score will increase by 0.16 points for each point they earned on the pre-exam.

Problem 6:

The y-intercept (or constant), $a=30.2$ , means that if a student's pre-exam total were 0, then they would expect to get a 30.2 on the final exam.

Problem 7:

$R^{2}=(0.60)^{2}=0.36=36\%$

Problem 8:

The fraction of variability (aka. coefficient of determination), $R^2$ , means that a certain proportion (or percentage) of the variance in the response variable can be explained by the explanatory variable. In context, this means that 36% of the variance in final exam scores can be explained by the pre-exam scores.

6 0

3 years ago

The purpose of this form is so that your employer can withhold the correct amount of federal income tax from your pay.

lana66690 [7]

Federal income tax is used to maintain and develop a country

The form that should filled so that an employer can withhold the correct amount of federal income tax from an employees pay is Form;

Reason:

Form W-4 in the employee's withholding certificate, it is a document or form given to a new employee by the employer to complete upon employment. The amount of tax an employer withholds from an employees paycheck is determined by how the employee fills the form.

The money withheld from the employees paycheck, along with the employees references; name and Social Security Number, are sent to the Internal Revenue Service (IRS) by the employer

The Form W-4 is meant to be completed in order that the employer can federal can withhold from the salary the correct amount from of the federal income tax from ones salary

Learn more here:

brainly.com/question/24004215

7 0

3 years ago

Find the common ratio of r 6,24,96,384

Vlad1618 [11]

Each term is 4 times the previous one.

3 0

4 years ago

The sale tax on the purchase of a refrigerator that cost 695 is 7 percent.What is the amount of sales tax

Dafna1 [17]

The answer is .07 × 695 = 48.65