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OlgaM077 [116]
3 years ago
15

Which of these statements about statistical models is true? I. Statistical models help better understand real-world systems. II.

Statistical models represent the real world. III. Statistical models help predict future behavior.
Mathematics
1 answer:
GenaCL600 [577]3 years ago
7 0
I would think statistical models help better understand real world systems
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Please help, i have 20 minutes to do this. 25 points
german

Answer:

RT = RADIUS

QS = DIAMETER

PS = CHORD

RTS = CENTRAL ANGLE

QSP = MAJOR ARC

QTR = MINOR ARC

QSR = SEMICIRCLE

Step-by-step explanation:

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3 years ago
A boy scout has 3 meters of rope. He cuts the rope into cords on 3/5 m long. How many cords will he make?
zepelin [54]
It should be 5, i have uploaded it worked out

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3 years ago
If n is a positive integer, then lim (n-->infinity) (1/n) [1/(1+(1/n)) + 1/(1+(2/n))+...+1/(1+(n/n)] is?
Anton [14]
The correct answer to this question is <span>d.) integral from 1 to 2 of (2/(x+1))
</span>To solve this:

Since Δx = 1/n. 
lim (n→∞) Δx [1/(1+Δx) + 1/(1+2Δx)+ ... + 1/(1+nΔx)] 
= lim (n→∞) Σ(k = 1 to n) [1/(1 + kΔx)] Δx. 

x <---> a + kΔx 

a = 0, then b = 1, so that Δx = (b - a)/n = 1/n

Since (1 + kΔx) combination, a = 1 so that b = 2. 
Then, f(1 + kΔx) <-----> f(x) ==> f(x) = 1/x. 

This sum represents the integral 
∫(x = 1 to 2) (1/x) dx, so the correct answer is <span>d.) integral from 1 to 2 of (2/(x+1))

Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help. 
</span>
3 0
3 years ago
Draw 2u + 4v. I NEED HELP LOLLLL
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I literally just saw a question like this, but it won’t let me upload my photo, says the answer is incorrect
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2 years ago
A researcher would like to examine the political attitudes for students at a local university. The researcher will evaluate a sa
professor190 [17]

Answer:

Simple random sampling

Step-by-step explanation:

Simple random sampling is a subdivision of a sample chosen from a population. Individuals are randomly chosen by chance and each individual possess the same characteristics as every other person in the population. It is a a surveying technique that is unbiased.

The idea of this sampling method is that every object has an equal chance of being chosen.

If the researcher evaluates 200 students out of the population and make sure the sample reflects the population, the sampling method used is simple random sampling.

6 0
4 years ago
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