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3 years ago

Okay guys this is just a guessing game who do you think will be president for the next 4 years

Business

1 answer:

Stolb23 [73]3 years ago

8 0

Donald j Trump helll yaaaaa

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Assume you have noted the following prices for books and the number of pages that each book contains.Book Pages (x) Price (y)A 5

tigry1 [53]

$a) $y=0.00991 x+1.042$b) $r^2=0.7503^2=0.563$\\C) $r=\frac{7(30095)-(4210)(49)}{\sqrt{\left[7(2595100)-(4210)^2\right]\left[7(354)-(49)^2\right]}}=0.7503$$

x: 500, 700, 750, 590 , 540, 650, 480

y: 7.00, 7.50 , 9.00, 6.5, 7.50 , 7.0, 4.50

We want to create a linear model like this :

$y=m x+b$

Where

$m=\frac{S_{x y}}{S_{x x}}$

And:

$\begin{aligned}& S_{x y}=\sum_{i=1}^n x_i y_i-\frac{\left(\sum_{i=1}^n x_i\right)\left(\sum_{i=1}^n y_i\right)}{n} \\& S_{x x}=\sum_{i=1}^n x_i^2-\frac{\left(\sum_{i=1}^n x_i\right)^2}{n}\end{aligned}$

With these we can find the sums:

$\begin{aligned}& S_{x x}=\sum_{i=1}^n x_i^2-\frac{\left(\sum_{i=1}^n x_i\right)^2}{n}=2595100-\frac{4210^2}{7}=63085.714 \\& S_{x y}=\sum_{i=1}^n x_i y_i-\frac{\left(\sum_{i=1}^n x_i\right)\left(\sum_{i=1}^n y_i\right) n}{=} 30095-\frac{4210 * 49}{7}=625\end{aligned}$

And the slope would be:

$m=\frac{625}{63085.714}=0.00991$

Now we can find the means for x and y like this:

$\begin{aligned}& \bar{x}=\frac{\sum x_i}{n}=\frac{4210}{7}=601.429 \\& \bar{y}=\frac{\sum y_i}{n}=\frac{49}{7}=7\end{aligned}$

And we can find the intercept using this:

$b=\bar{y}-m \bar{x}=7-(0.00991 * 601.429)=1.042$

And the line would be:

$y=0.00991 x+1.042$

Part b

The correlation coefficient is given by:

$r=\frac{n\left(\sum x y\right)-\left(\sum x\right)\left(\sum y\right)}{\sqrt{\left[n \sum x^2-\left(\sum x\right)^2\right]\left[n \sum y^2-\left(\sum y\right)^2\right]}}$

For our case we have this:

$\begin{aligned}& \mathrm{n}=7 \sum x=4210, \sum y=49, \sum x y=30095, \sum x^2=2595100, \sum y^2=354 \\& r=\frac{7(30095)-(4210)(49)}{\sqrt{\left[7(2595100)-(4210)^2\right]\left[7(354)-(49)^2\right]}}=0.7503\end{aligned}$

The determination coefficient is given by:

$r^2=0.7503^2=0.563$

Part c

$r=\frac{7(30095)-(4210)(49)}{\sqrt{\left[7(2595100)-(4210)^2\right]\left[7(354)-(49)^2\right]}}=0.7503$

Learn more about regression line to visit this link

brainly.com/question/7656407

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4 0

1 year ago

Thats nice but did you know geico can save you 20% more on car insurance

kenny6666 [7]

Answer:

thanks youuuuuuuuuuuuu

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3 years ago

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B. gross income - (required deductions + optional deductions)

Explanation:

Take-home refers to the net pay of an individual. Salaried employees are subject to statutory deduction, such as taxes and pensions. An employee may also have voluntary deductions like loans or a mortgage. The net pay that an employee receives after all deductions is the take-home pay.

Take-home is subject to state laws and regulations. Employers are not allowed to deduct employees' pay beyond a certain percentage. The law requires an employee to have a take-home of around 36 percent if his or her net income.

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4 years ago

The database of Aster Corp. was hacked and confidential data was leaked to its competitors. This resulted in a huge financial lo

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This business risk is known as the operational risk. The operational risk is a possibility of loss resulting from a failed operational procedures, systems, and policies. Adequate procedures, systems, and policies must have been made to control and monitor the flow of a company's business operation.

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3 years ago

Profit motive is any money that is earned. True False M

Papessa [141]

Answer:True

Explanation:

Too easy

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Okay guys this is just a guessing game who do you think will be president for the next 4 years​

Okay guys this is just a guessing game who do you think will be president for the next 4 years