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Sholpan [36]
3 years ago
10

Compare the characteristics of subsistenc agriculture and commercial agriculture

Advanced Placement (AP)
1 answer:
Zinaida [17]3 years ago
6 0

Answer:

Subsistence & Commercial Defined:

Subsistence Agriculture is the production of food primarily for consumption by the farmer's family. Commercial Agriculture is the production of cash crops primarily for sale off the farm.:

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[EDITED] NEED HELP ON STATS QUESTION 40 POINTS
Margaret [11]
<h3>Answer:</h3>
  1. A — 1
  2. B — ∑[k=0..2] 15Ck(.24^k)(.76^(15-k))
  3. D — 12 and 3.1
  4. A — 0.1091
  5. B — 0.83 ...
<h3>Explanation:</h3>

1. The probability is 0.52 that the officer will pull over a driver and then the expected number more. So, if x is the expected number of drivers pulled over until one is not texting, we have ...

... x = 0.52(1+x)

... 0.48x = 0.52

... x = 0.52/0.48 = 13/12 = 1 1/12 ≈ 1 . . . . matches selection A

(<em>Comment on this result</em>: I find it interesting that these are the odds in favor of finding a driver who texts. That is, if the probability of texting is 0.98, the odds are 49:1 that a driver will be texting, and the expected number of pull-overs is 49.)

2. The probability of at most 2 being cured is the probability of 0, 1, or 2 being cured. You need to add up those probabilities. The sum in answer selection B does that.

3. The mean of a binomial distribution is ...

... μx = np = 60·0.2 = 12

... σx = √(np(1-p)) = √(12·0.8) ≈ 3.0984

These match selection D.

4. 20C14(0.8^14)(0.2^6) = 38760·.043980·0.000064 ≈ 0.109100 . . . matches A

5. mean(x) = 0.94; mean(x^2) = 1.58, so ...

... σx = √(1.58 -0.94²) ≈ 0.83 . . . . matches selection B

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A significance test was conducted using the hypotheses H_0: \mu_N-\mu_H=0, H_a: \mu_N-\mu_H &lt; 0H 0 ​ :μ N ​ −μ H ​ =0,H a ​ :
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