20 POINTS PLS HELP!!

1 answer:

5 0

The correct couples are:
1) Lurking variable
Lurking variables are random variables related to the variables you want to study and which affect them. Their effect is often unnoticed (that is why they are lurking), but they make stronger or weaker the relationship between the explanatory and responsive variables.

2) Line of best fit
The "line of best fit" is the straight line that best represents the data in a scatter plot. The least squares method provides the steps needed to find which line minimize the difference between the expected and the observed values. Therefore, "line of best fit" and "least squares regression line" are synonymous.

3) Correlation coefficient
A correlation coefficient is a number that represents the statistical relationship between two variables. Pearson's coefficient r is a measure of the strength and direction of the linear relationship between two variables.

4) Correlation
An association is, in statistics, any relationship between two variables. A correlation is a measure of how strongly two variables have a linear relationship with each other. Therefore, "correlation" and "association" are synonimous.

5) Causation
The term "causation" means that there is a "cause and effect" relationship between two events, meaning that one event occurs because an other event has occured. Hence, <span>there is a causal relationship between the two events.</span>

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<img src="https://tex.z-dn.net/?f=%28%20%5Cfrac%7B1%7D%7B2%7D%29%5E%7B2%7D%20" id="TexFormula1" title="( \frac{1}{2})^{2} " alt=

Vladimir79 [104]

All you need to do is solve it
$\frac{1}{2} ^{2}$ or $\frac{1}{2} x \frac{1}{2}$
When solved your answer is 0.25 or 1/4
------------------------
What I did to solve it was....

1. Divide top fraction by bottom fraction to get decimal
1 ÷ 2 = 0.5

2. Then multiply 0.5 by its self (the same as putting it to the ^2)
0.5 x 0.5 = 0.25

5 0

3 years ago

at 5pm two hip started sailing toward each other from ports which were 300 miles apart at average rates of 20 and 25 mes per hou

maw [93]

If the average rates were 20 and 25 miles per hour, then together they cover 45 miles of the distance they are separated by per hour. The ships will be 30 miles apart when 270 miles have been covered, so it takes 270/45=6 hours to cover the distance. 6 hours after 5 PM is 11:00 PM.

7 0

3 years ago

A family travels 989.5 miles in 17.8 hours. Estimate the number of miles they can travel in one hour.

antoniya [11.8K]

989.5 divided by 17.8 is 55.5898876404
so about 55 ish
I think that's right but I'm not sure :)

3 0

2 years ago

A basketball player is shooting a basketball toward the net. The height, in feet, of the ball t seconds after the shot is modele

aev [14]

THIS IS THE COMPLETE QUESTION

basketball player is shooting a basketball toward the net. The height, in feet, of the ball t seconds after the shot is modeled by the equation h = 6 + 30t – 16t2. Two-tenths of a second after the shot is launched, an opposing player leaps up to block the shot. The height of the shot blocker’s outstretched hands t seconds after he leaps is modeled by the equation h = 9 + 25t – 16t2. If the ball reaches the net 1.7 seconds after the shooter launches it, does the leaping player block the shot?

Yes, exactly 0.6 seconds after the shot is launched.

Yes, between 0.64 seconds and 0.65 seconds after the shot is launched

Yes, between 0.84 seconds and 0.85 seconds after the shot is launched.

No, the shot is not blocked.

Answer:

Yes, between 0.84 seconds and 0.85 seconds after the shot is launched.

Given that the

equation for shot block height h = 9 + 25t – 16t2.

equation for ball height h = 6 + 30t – 16t2.

From the question ,it can be deducted that the shot is made before two tenths of a second or 0.2seconds

CHECK THE ATTACHMENT TO COMPLETE THE DETAILED SOLUTION