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 Wysłany: Pon 11:09, 04 Kwi 2011 Temat postu: Efforts to improve student ability to solve proble |
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Efforts to improve student ability to solve problems:
15;. · I1 × 0.03 (Triple A for the type, the other two for type =. A 46 × 0.40 × 0 · × o · 03.; But (not an artificial AB) type = c20.03. × (1 - 0.03).. belong to the same type of phenomenon Yigai many, the nature of control problems, to determine the ownership of the problem is an important basic skills. on the cases of abstract 'generalized Bernoulli probability model', after thinking it should remain an appropriate Question: A particle starting from a point on the plane, and so may be way up, down, left, fourth right direction of swimming. each tour distance is 1. request after swimming through the 2m times the probability that the particle back to the original place. (hint : up, down, left, right and so the number of synchronized swimming almost symmetrical attributable to generalized Bernoulli probability model, the probability of toxic events of concern to a (})×( seven) × (Temple )×(÷)( c) (÷)But the concern is no longer a simple 'five successful tests of the' standard event. The problem is a test to determine the 'multiplicity, two events to determine the standard of care' event of the relationship between the multiplicity m + without saying that Yu, who is self-evident through the diagram of its structure: the former m + - a piece of hyperphagic l: time, × X × ... ... × ... ... × m + trials noted a total of independence, seeking to know the probability (c. expansion) ×. as a solution to the problems continue. to stay Questions: someone has two boxes of matches, each box the root, each time with a match in any of the boxes from which to take out a box. ① seeking out of a box when The other remaining case r root (1 ≤ r ≤) probability. @ find first found an empty box is still all the other r root (1 ≤ ≤) probability. (Hint: ① problem can be abstracted as' to examine failure of a successful r times before, pay attention to the column symmetry, the probability is 2 × c find a - (audio) × (No.) ... × number. The problem is controllable as'-r failures occurred in the first +! successful before the '. noted that the symmetry, the probability of seeking a 2 × c {;:。+) l】 (})is the 'eyes closed to take the match.) * therapy, * Example 3. the second independent test. incident side of the fifth test probability for the K, find the event A is currently in trials in the total number of financial mathematical expectation and variance. Analysis: As may be different from each other, the problem should be the promotion of the (conditions of 'repeat relaxed). The problem how to solve? analogy in the establishment, we have encountered: l The simplest scenario: If Phoenix is the first recorded incident K tests times, we know their distribution by 『J:』 further noted that the total number of trials with the cumulative relationship between the random variables are independent and: Σ. Known as the distribution and test the independence of the K-l Example 4. on a target shooting, each time firing a projectile, until the hit times so far. set fire to each other independent of the time. and the probability of hitting the target every time. Find the bullet consumption; the mathematical expectation. Analysis: The first shot as a basis for testing the test is not wait for the repetition of words and independence. But the test is no longer a constant number of heavy, are involved in the multiplicity of Shu variable test sequence,[link widoczny dla zalogowanych], and therefore the promotion. notes have been struck by a hit times are ■ The sum of ammonia as the fifth note of a 1 hit to consumption between the fifth bomb hit a few, won 『J is easy to have an independent and relationships: = Σ. cooked((by =) = g.), can be ():÷。 down 5. in the same conditions, independently measured the length of something, fifth measurement results. such as to set up a Ⅳ (4,0) <V = 1,2, ...) Calculate the average length ÷ measurements of the expectation and variance. T matter the length of this measure as a basis for a test. Repeat with the independence of the test clearly. The basic results, but non-infinite number of columns, it is involved in repeated independent trials is' the promotion. Since the distribution can not be determined by the two points. May wish to follow a normal distribution of the set can be used (due to omitted). The nature of the expectation and variance can be obtained: five (one {) =, D (one) = {. (With these two results. Arithmetic average method to find the probability of the K-lK ● l a theoretical basis.) · B6 · cylinder K. ΣKlJ) (DE. ΣKlI) (F it is easier
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