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3 years ago

What is the difference between the following two regression equations? Choose the correct answer below.

Mathematics

1 answer:

olga55 [171]3 years ago

8 0

Answer:

The correct option is (A). The first equation is for sample data; the second equation is for a population.

Step-by-step explanation:

According to the scenario, the following would be represented as a sample and the population

Y with caret = b0 + b1x = sample

and

y = b0 + b1x = population

It is because if we considered the population than the expected value would be nearest and there is no need to determine the b0 and b1 value again. But in the case of the sample, the reestimation of the values would be determined again and again

Therefore the correct option is A.

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PLEASE HELP! URGENT! WILL GIVE BRAINLIEST!

alexandr402 [8]

1. The answer is 1. To get this answer, substitute x=3 into the function and solve for f(x)

2. The answer is 12. Substitute -5 in place for f(x) and isolate and solve for x.

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3 years ago

What are the zeros of the graphed function y = 1/3 (x + 3)(x + 5)?

Darya [45]

One factor will be zero, hence y will be zero, when x=-3.

The other factor will be zero, hence y will be zero, when x=-5.

The zeros of the function are x ∈ {-5, -3}.

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This solution makes use of the "zero product rule," which states a product is zero if and only if one or more factors is zero.

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3 years ago

A model rocket is launched with an initial velocity of 200 ft per second. The height h, in feet, of the rocket t seconds after t

Solnce55 [7]

Answer:

2.10 s, 10.40 s.

Step-by-step explanation:

We know that the height of the rocket is given by the function:

$h=-16t^2+200t$

We are asked to find the time for which the height of the rocket will be 350 ft. So, for that moment, we know the height but we don't know the time; however, we know that the equation can help us to find the time, doing h=350:

$350=-16t^2+200t$

The last is a quadratic equation, which can be put in the form $at^2+bt+c=0$ and solved applying the formula:

$t=\frac{-b+-\sqrt{b^2-4ac} }{2a}$

So, let's put the equation on the form $at^2+bt+c=0$ adding $16t^2$ and subtracting $200t$ to each side of the equation; the result is:

$16t^2-200t+350=0$

So, we note that a=16, b=-200, and c=350.

Then,

$t_1=\frac{200-\sqrt{200^2-4*16*350} }{2*16}=2.10$

$t_2=\frac{200+\sqrt{200^2-4*16*350} }{2*16}=10.40$

According to the equation, that are the times for which the height will be 350 ft; that is because the rocket is going to ascend and then to fail again to the ground.

4 0

3 years ago

Do the ratios 1/2 and 6/12 form a proportion

lawyer [7]

Answer:

Step-by-step explanation:

Yes because 6 is 1/2 of 12

6 0

3 years ago

Read 2 more answers

The above figure is a special trapezoid. Explain the relationship between the mB and mC

artcher [175]

Answer:

They are supplementary

Step-by-step explanation:

Since AB and DC are parallel, then the alternate interior angles are congruent because there is transversal cutting the parallel lines (BC). So m<B is supplementary to m<C

6 0

2 years ago

What is the difference between the following two regression​ equations? Choose the correct answer below.

What is the difference between the following two regression equations? Choose the correct answer below.