3 years ago

How can you recognize and interpret associations in two-way tables?

1 answer:

galina1969 [7]3 years ago

3 0

Answer:

Sometimes the best way to tell whether two variables are associated is to ask yourself whether they are not associated. Think backward. In a two-way frequency table, if the relative frequencies for one variable are the same (or close) for all categories of another variable, there is no (or little) associa

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Luda [366]

Answer:

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Step-by-step explanation:

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3 years ago

Find the volume of the solid that lies between planes perpendicular to the x-axis at x = pi/4 and x = 5pi/4. The cross-sections

svp [43]

Answer:

The volume of the solid = π²

Step-by-step explanation:

As per the given data of the questions,

The diameter of each disk is

D = 2 sin(x) - 2 cos(x)

So its radius is

R = sin(x) - cos(x).

The area of each disk is

$= \pi \times(sinx-cosx)^{2}$

$= \pi \times [sin^{2}(x) - 2 sin(x) cos(x) + cos^{2}(x)]$

$= \pi[1-2sin(x)cos(x)]$

$= \pi[1-sin(2x)]$

Now,

Integrate from $x=\frac{\pi}{4}\ \ \ to\ \ \ x=\frac{5\pi}{4}$ , we get volume:

$V=\int_{\frac{\pi}{4}}^{\frac{5\pi}{4}} \pi[1-sin(2x)]dx$

After integrate without limit we get

$V=\pi[x+\frac{cos2x}{2}]$

Now after putting the limit, we get

V = π²

Hence, the required volume of the solid = π²

3 0

3 years ago

What is the midpoint of a segment in the complex plane with endpoints at 6 – 2i and –4 + 6i?

igomit [66]

1+2i

to find the midpoint you do it just like you did with rectangular coordinates,
add and divide by 2 the real component and the imaginary components.

$\frac{6-4}{2} = \frac{2}{2} = 1$

and

$\frac{-2i+6i}{2} = \frac{4i}{2} = 2i$

7 0

3 years ago

in 2010 the population of rhode island was approximately 1053000. if the population decrease was 0.3% find the population of rho

maks197457 [2]

1049841 1053000x.003=3159 1053000-3159=1049841

4 0

3 years ago

The length of time of the school field day was decreased

Tju [1.3M]

18% because take the first digits of each number and put them together lol

8 0

3 years ago