Which compound inequality is equivalent to | ax -b | > C for all real numbers a, b, and c, where c>0?

The correlation between the height and weight of children aged 6 to 9 is found to be about r = 0.8. Suppose we use the height x

Andrew [12]

Answer:

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

The value of r is always between $-1 \leq r \leq 1$

And we have another measure related to the correlation coefficient called the R square and this value measures the % of variance explained between the two variables of interest, and for this case we have:

$r^2 = 0.8^2 = 0.64$

So then the best conclusion for this case would be:

c. the fraction of variation in weights explained by the least-squares regression line of weight on height is 0.64.

Step-by-step explanation:

For this case we know that the correlation between the height and weight of children aged 6 to 9 is found to be about r = 0.8. And we know that we use the height x of a child to predict the weight y of the child

We need to rememeber that the correlation is a measure of dispersion of the data and is given by this formula:

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

The value of r is always between $-1 \leq r \leq 1$

And we have another measure related to the correlation coefficient called the R square and this value measures the % of variance explained between the two variables of interest, and for this case we have:

$r^2 = 0.8^2 = 0.64$

So then the best conclusion for this case would be:

c. the fraction of variation in weights explained by the least-squares regression line of weight on height is 0.64.

3 0

3 years ago

Oscar chose A as the correct answer. How did he get that answer?

ElenaW [278]

how am i supposed to know if you dont give the whole question.

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Seventeen is equal to seven plus ten

alina1380 [7]

Answer:

yes

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Write a compound inequality to represent :

harina [27]

A. -1 < x < = 39

B. <----------------------------^ *------------->
< ___-1___0___1__2__3__4___5___6____7____>

the dot above the 3 is open...the dot above the 6 is solid

4 0

3 years ago

How do I do percentages? Please explain like it would be like in a shop: for example whats 15% off of something.

yawa3891 [41]

Ok see for doing percentage it is very easy just divide it by the main number I mean see if there is a food price 10 dollars and it has 20%off then u divide 20/10x100 u divide it by the actual number and then multiply it by 100 so the answer of my 20/10x100 is 10x20/100 ok so the answer is 2. The price is 2

6 0

3 years ago