What are some of googles resources

Let x be per capita income in thousands of dollars. Let y be the number of medical doctors per 10,000 residents. Six small citie

MAVERICK [17]

Answer:

The percentage of variation esplained by the model is given by the determination coefficient, on this case:

$R^2 = 0.934^2 =0.872$

And we have 87.2% of the variation explained by the linear model given.

$\hat y = 5.756(8.5) -36.895=12.031$

And we have 12.031 doctors per 10000 residents.

Explanation:

Assuming the following dataset:

x y

8.6 9.6

9.3 18.5

10.1 20.9

8.0 10.2

8.3 11.4

8.7 13.1

Assuming this question: "The data has a correlation coefficient of r = 0.934. Calculate the regression line for this data. What percentage ofvariation is explained by the regression line? Predict the number of doctors per 10,000 residents in a town with a per capita income of $8500."

We want a linear model like this:

$y = mx +b$

Where m represent the slope and b the intercept for the linear model. And we cna find the slope and b with the following formulas:

$m = \frac{n \sum xy - \sum x \sum y}{n \sum x^2 -(\sum x)^2}$

$b = \frac{\sum y}{n} -m \frac{\sum x}{n}$

And from the dataset we have the following values:

$n= 6, \sum x =53, \sum y = 83.7 , \sum xy = 755.89, \sum x^2 = 471.04$

And replacing into the equation for m we got:

$m =\frac{6(755.89) - (53)(83.7)}{6(471.04) -(53)^2}=5.756$

And the intercept:

$b = \frac{83.7}{6}-36.895 5.756 \frac{53}{6}=-36.895$

And then the linear model is given by:

$\hat y = 5.756 x -36.895$

We can find the estimation replacing x = 8.5 into the linear model and we got:

$\hat y = 5.756(8.5) -36.895=12.031$

And we have 12.031 doctors per 10000 residents.

The percentage of variation esplained by the model is given by the determination coefficient, on this case:

$R^2 = 0.934^2 =0.872$

And we have 87.2% of the variation explained by the linear model given.

4 0

2 years ago

A trading arrangement that eliminates most or all barriers to trade among participating nations and utilizes common barriers to

Katen [24]

Answer:

preferential trade agreement

Explanation:

This agreement is known as a preferential trade agreement. It is called this because it tends to make it easier for specific goods to be traded but only to the countries that are part of the group and/or agreement. This agreement also makes it harder for countries that are not part of the agreement to be able to trade with the countries that are in order to maintain the countries within the agreement trading with each other.

4 0

3 years ago

Janelle likes to keep all her savings goals separate, so she has an account for each one, including an account to save for her c

Alexxx [7]

Answer:

Yea janelle like to keep all her savings good for her

Explanation:

5 0

3 years ago

On July 1 of last year, total employees at company E was decreased by 10 percent. Without any change in the salaries of the rema

babymother [125]

Answer:

The total of the combined salaries of all the employees at Company E after July 1 last year was 110% of that before July 1 last year.

Explanation:

If we use numbers, as example, we can get that:

Before July 1st Company E' s employes had in average salary of $100.000 (example).

If, after the decreased of employees, average salary was 10% percent more, that means that:

$100.000 x 10%= <u>$10.000 </u>

So, total of combined salaries after decreased was

$100.000+$10.000= $110.000

$110.000 is the 110% of the average salary before decreased because:

<u>$110.000/100.000 = 110%</u>

5 0

2 years ago

Company ABC reported the following: 1. Net Income: $110,000 2. Return on Sales (Net Income/Sales): 3.56% 3. Gross Profit Percent

Sergeeva-Olga [200]

Answer:

$2,266,123.60

Explanation:

As it is given

Return on sales = Net income ÷ Sales

3.56% = $110,000 ÷ Sales

So, the sales is $3,089,887.64

Now the Gross Profit percentage is

Gross Profit percentage = Gross profit ÷ Sales

26.66% = Gross profit ÷ $3,089,887.64

So, the gross profit

= $823,764.044

Now the cost of goods sold is

= Sales - gross profit

= $3,089,887.64 - $823,764.044

= $2,266,123.60

8 0

3 years ago