MATHEMATICS HIGH SCHOOL

Recent research suggests that depression significantly increases the risk of developing dementia later in life (BBC News, July 6, 2010). In a study involving 949 elderly persons, it was reported that 22% of those who had depression went on to develop dementia, compared to only 17% of those who did not have depression.a. Choose the relevant population and the sample. (You may select more than one answer. Bold the answer(s) that are correct.)1. The sample consists of all elderly people.2. The sample consists of 949 elderly people.3. The population is all younger and elderly people.4. The population is all elderly people.b. Do the numbers 22% and 17% represent the population parameters or the sample statistics? Bold the answer that is correct.Population parametersSample Statistics

Answers

Answer 1

Answer:

Answer:

2. The sample consists of 949 elderly people

4. The population is all elderly people

B. The numbers 22% and 17% represents the sample statistics

Step-by-step explanation:

The study was based on a recent research that suggest that depression significantly increases risk of dementia later in life, so for every result gotten from this study, it is tied to only the samples chosen for the aim of the study which are the 949 elderly people.

Related Questions

Please tell me if this is right please
9 + 4y = -5x + 7y solve for x
How far will a jet travel in 2 hours and 30 minutes if its average speed is 450 miles per hour?
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If sin of beta = 4/7, what is cos of beta?

Answers

sin²β +cos²β=1
cos²β=1-sin²β
cos²β=1-(4/7)²
cos²β=1-16/49=49/49-16/49=33/49
cosβ=√33/√49=√33/7

Use long division to find the quotient below.
(4x² - 7x-2) + (x-2)

Answers

Answer:

4x+1

Step-by-step explanation:

$(4x^2-7x-2)/(x-2)= \n\n(x-2)(4x+1)/(x-2)= \n\n4x+1$

Hope this helps!

Find the volume of a cube whose diagonal measures 36√3 cm.

Answers

Answer:

$46656 cm^3$

Step-by-step explanation:

If a cubes diagonal measures you can solve for its sidelength by creating a triangle. Visualize the diagonal as the hypotenuse of our triangle inside the cube. Then, one of the legs would be the side of the cube itself, and the other leg would be the diagonal of the bottom side of the cube. Knowing this is a cube, we can call each side s. If each side is s, then the diagonal of the bottom face is $s√(2)$ ( this is a special triangle property, $45-45-90$ triangle.) Then we know our triangle is a right triangle, so we can use the Pythagorean theorem to solve for s.

$s^(2) + (s√(2) )^(2) = (36√(3))^2$

Solve this equation for s.

$s^(2) + 2s^(2) = 3888$

$3s^(2) = 3888$

$s^(2) = 1296$

$s = 36$

Since we now found the side length of the cube, we can find its volume by cubing the side length:

$s^3 = (36)^3 = 46656$ $cm^3$

25d-14d+8d=95

whats the value of d and show work

Answers

Simplify both sides of the equation

25d-14d+8d = 95

Simplify

19d = 95

Divide both sides by 19

19d/19 = 95/19

d = 5

I hope that's help !

25d-14d+8d=95
as all of the terms on the left are 'd's then we consider them to be called like terms. When we have like terms we can add or subtract freely.
so:
25d-14d= 11d
11d+8d = 19d
therefore we get:
19d = 95
this is the same as
19*d=95
to find do we need to 'work backwards' to move the 19 to be with 95.
So to 'work backwards' we do the opposite of multiply and divide it instead to both sides of the equation.
19/19*d=95/19
d=95/19
d= 5

Solve the equation for k.
k=5/12
omg please help me

Answers

5 divided by 12 is 0.41666667

Answer:

k=0.416

Step-by-step explanation:

k= $(5)/(12)$ right?

0.09502 to 2 decimal places

Answers

0.09502 to 2 decimal places

any number which is 5 or greater rounds to the next number

0.1 will be our answer

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