第一篇:SAT數(shù)學(xué)統(tǒng)計(jì)學(xué)七大運(yùn)算解析
SAT數(shù)學(xué)統(tǒng)計(jì)學(xué)七大運(yùn)算解析
SAT數(shù)學(xué)考查的內(nèi)容很多很雜,對(duì)于統(tǒng)計(jì)學(xué)部分我們首先來看一下7個(gè)主要的運(yùn)算,也就是眾數(shù)、值域、平均數(shù)、中數(shù)、標(biāo)準(zhǔn)偏差、標(biāo)準(zhǔn)方差等等,下面是對(duì)這7個(gè)運(yùn)算的解析以及舉例說明。
1.mode(眾數(shù))
一堆數(shù)中出現(xiàn)頻率最高的一個(gè)或幾個(gè)數(shù)
e.g.mode of 1,1,1,2,3,0,0,0,5 is 1 and 0
2.range(值域)
一堆數(shù)中最大和最小數(shù)之差 ,所以統(tǒng)計(jì)學(xué)上又稱之為極差.(兩極的差)
e.g.range of 1,1,2,3,5 is 5-1=4
3.mean(平均數(shù))
arithmatic mean(算術(shù)平均數(shù)): n個(gè)數(shù)之和再除以n
geometric mean(幾何平均數(shù)): n個(gè)數(shù)之積的n次方根
4.median(中數(shù))
將一堆數(shù)排序之后,正中間的一個(gè)數(shù)(奇數(shù)個(gè)數(shù)字),或者中間兩個(gè)數(shù)的平均數(shù)(偶數(shù)個(gè)數(shù)字)
e.g.median of 1,7,4,9,2,2,2,2,2,5,8 is 2
median of 1,7,4,9,2,5 is(5+7)/2=6
5.standard error(標(biāo)準(zhǔn)偏差)一堆數(shù)中,每個(gè)數(shù)與平均數(shù)的差的絕對(duì)值之和,除以這堆數(shù)的個(gè)數(shù)(n)
e.g.standard error of 0,2,5,7,6 is:
(|0-4|+|2-4|+|5-4|+|7-4|+|6-4|)/5=2.46.standard variation
一堆數(shù)中,每個(gè)數(shù)與平均數(shù)之差的平方之和,再除以n
標(biāo)準(zhǔn)方差的公式:d2=[(a1-a)2+(a2-a)2+....+(an-a)2 ]/n
e.g.standard variation of 0,2,5,7,6 is: average=4
((0-4)2 +(2-4)2+(5-4)2+(7-4)2+(6-4)2)/5=6.8
7.standard deviation
就是standard variation的平方根
以上就是關(guān)于SAT數(shù)學(xué)統(tǒng)計(jì)學(xué)7大運(yùn)算的解析。SAT考試對(duì)于錄取與否及獎(jiǎng)學(xué)金多少的影響非常大,數(shù)學(xué)又是重點(diǎn)與難點(diǎn),希望大家多加重視,從最基本、最簡單的知識(shí)開始就掌握牢固。
第二篇:SAT詞匯填空解析
雖然沒有國內(nèi)高考“萬人爭過獨(dú)木橋”的慘烈廝殺,SAT戰(zhàn)場(chǎng)卻也是處處彌漫硝煙的狹路相逢。其中的填空部分,被同學(xué)們戲稱為“變態(tài)級(jí)”的難度,應(yīng)接不暇的“奇葩”單詞讓眾考生直呼Hold不住全場(chǎng),但仔細(xì)想來卻也不是無章可循。古話說:“知己知彼,百戰(zhàn)不殆”,接下來谷天田外語便邀請(qǐng)大家一起從2013年的考題透析整個(gè)填空部分。
首先,考試題型。2013年仍然是主要考察一空題和兩空題。一空題多出現(xiàn)在1,2題(Easy)和7,8題(Hard),著重考的是單詞基礎(chǔ)。比如,13年1月考題:Bessie Coleman, the world’s first licensed Black aviator, was considered ______ because she regularly performed risky flying stunts.A circumspect B venturesome C oblique D decorous E magnanimous 只要抓住關(guān)鍵詞risky,答案呼之欲出。而7,8位置的單選則會(huì)出現(xiàn)“會(huì)者秒殺題目,不會(huì)者被題目秒殺”的情況,單詞是硬道理。兩空題大部分出現(xiàn)于中間以及最后Hard的位置,如13年5月考題:Joe publicly advocates___ and self-control but, oddly enough ,seems to admire most people who achieve great things through______.A simplicity...restraint B generosity?benevolence C moderation?recklessness D contrariness?intimidation E prosperity?obedience 除了單詞,后者考察的閱讀和邏輯能力也不容忽視。
其次,??純?nèi)容。ETS在考察內(nèi)容上也有幾類話題倍受青睞。比如,以上所提到的一空題就是考察品質(zhì)的題目,細(xì)心(circumspect),慷慨(magnanimous),貪婪(ravenous),堅(jiān)韌(intransigent)都是重中之重(13年考試中全部出現(xiàn)),幾乎次次必考。再如,文學(xué)風(fēng)格類,主要考察作者的寫作風(fēng)格,簡潔(concise)還是復(fù)雜(intricate),易懂(lucid)還是晦澀(convoluted)。其余的也會(huì)考察到職業(yè)身份(virtuoso“鑒賞家”),政治歷史,地理天文等等方面。但是鑒于考試中都會(huì)給予解題關(guān)鍵詞,所以大可不必?fù)?dān)心不理解背景專業(yè)知識(shí)等問題。
再次,常見問題。同學(xué)們心中不可逾越之鴻溝必定是單詞。谷天田外語一直以為填空可以是SAT中最簡單也可以是最難的一部分,關(guān)鍵在于自己行不行動(dòng)記單詞。接下來有幾種方法可以幫助同學(xué)們快速記單詞,突破題目。第一種,諧音記單詞。此種方法適合的單詞比較局限,優(yōu)點(diǎn)是過目不忘。比如,“cantankerous”,意為“脾氣暴躁的”,中文發(fā)音類似“開坦克的”,開著坦克的美國大兵,脾氣應(yīng)該好不到哪里。再如,“morose”意為“憂郁的”。漢語發(fā)音近似“木有玫瑰”。試想情人節(jié)別人都收到玫瑰唯獨(dú)你沒有會(huì)是什么心情呢,morose形容再恰當(dāng)不過了。第二種,家族體系法。相信大家已經(jīng)從第二題看出同反義詞的考察了。那么如果同學(xué)們?cè)賵?zhí)意單個(gè)記單詞的話,那就只能“事倍功半”了。最后,詞綴記單詞。在具備了一定單詞量基礎(chǔ)之后,同學(xué)們可以有意識(shí)的學(xué)習(xí)下詞根詞綴的知識(shí),往往考場(chǎng)上可以幫助大家有根據(jù)的猜中答案。比如,熟知“omni-”全方位之意,便可猜測(cè)“omnipresent”為“普遍存在”之意。
最后,學(xué)習(xí)策略。首先,谷天田外語建議大家先跟著班級(jí)(比如SAT精品班)全面了解下SAT相關(guān)知識(shí)點(diǎn),考試形式,注意事項(xiàng)。有了課上老師們的指點(diǎn),再加以自己的努力,那么水到渠成,不言而喻。其次,有了明確的學(xué)習(xí)方向以后,同學(xué)們的消化吸收會(huì)至關(guān)重要。單就填空這科來講,因?yàn)椴灰笸瑢W(xué)們會(huì)拼寫會(huì)應(yīng)用,3500左右的核心詞匯建議同學(xué)們汲取各種時(shí)間每個(gè)單詞刷到80遍以上,便可攻克他山之石了。簡言之,填空,可以是最難的一科,但同樣可以是最簡單的一科,關(guān)鍵在于你,敢不敢行動(dòng)!
第三篇:SAT數(shù)學(xué)復(fù)習(xí)計(jì)劃
杭州新航道
新航道:SAT數(shù)學(xué)復(fù)習(xí)計(jì)劃
杭州新航道 SAT頻道為各位考生整理了SAT數(shù)學(xué)復(fù)習(xí)計(jì)劃,更多SAT資訊請(qǐng)繼續(xù)關(guān)注杭州新航道官網(wǎng)。
對(duì)于國內(nèi)考生來說,SAT數(shù)學(xué)考試可謂是SAT考試中的一塊大蛋糕,雖然SAT數(shù)學(xué)難度不高,但也沒有那么簡單,所以是否能得到高分是根據(jù)自身水平和細(xì)心程度來決定的,在SAT數(shù)學(xué)考前給自己制定一個(gè)合適的SAT數(shù)學(xué)復(fù)習(xí)計(jì)劃,也為取得好成績打下基礎(chǔ)。
很多中國學(xué)生覺得SAT數(shù)學(xué)難度不高,由于輕視,都選擇平時(shí)不做,考前隨便做幾套數(shù)學(xué)模擬,背一遍單詞,就去考,然后SAT就會(huì)用710來回應(yīng)這種輕視。
對(duì)于還有1個(gè)半月就要考試的SAT數(shù)學(xué)復(fù)習(xí)計(jì)劃:
1、還有1個(gè)半月,開始背誦SAT數(shù)學(xué)單詞,做OG、OC上的數(shù)學(xué),總結(jié)難題錯(cuò)題,把知識(shí)點(diǎn)總結(jié)出來。在這個(gè)過程中,記憶單詞和做真題是結(jié)合在一起的,因?yàn)檫@樣更加節(jié)省時(shí)間和更加有效率。
2、在做題的過程中,看2遍題干。這一點(diǎn)僅僅是對(duì)中國考生的特點(diǎn)來說的。因?yàn)楹芏嗫忌鷷?huì)下意識(shí)的產(chǎn)生輕敵的思想,然后,在看一遍題目之后就匆匆下結(jié)論。大家可以在備考的是就養(yǎng)成這樣的習(xí)慣,對(duì)于考試有很大的幫助。
3、考前的真題???,一定要做數(shù)學(xué);繼續(xù)收集錯(cuò)題和總結(jié)知識(shí)點(diǎn);繼續(xù)背誦數(shù)學(xué)單詞。事實(shí)上,記憶單詞和復(fù)習(xí)真題的過程應(yīng)該貫穿整個(gè)備考復(fù)習(xí)的全過程。
4、考前幾天,把數(shù)學(xué)單詞和數(shù)學(xué)錯(cuò)題知識(shí)點(diǎn)再過2遍。
以上是杭州新航道SAT培訓(xùn)頻道小編整理的SAT數(shù)學(xué)復(fù)習(xí)計(jì)劃,更多資訊、資料請(qǐng)?jiān)L問新航道官網(wǎng)。
杭州新航道
第四篇:SAT語法句子改錯(cuò)題解析
SAT語法句子改錯(cuò)題解析
SAT語法句子改錯(cuò)題規(guī)則有時(shí)和我們通常所學(xué)的語法書上的知識(shí)點(diǎn)有所出入,規(guī)則也不盡相同。再次,SAT語法句子改錯(cuò)題的考察中,不僅僅會(huì)考到你是否能判斷這個(gè)句子正確與否,而且會(huì)考到這個(gè)句子是否有效和簡潔,這就大大提升了題目的難度。下面小編整理的就是關(guān)于SAT語法句子改錯(cuò)題解析的相關(guān)內(nèi)容,大家請(qǐng)看下面5個(gè)題:
1.A patient accusing a doctor of malpractice will find it difficult to prove damage if there is a lack of some other doctor to testify about proper medical procedures.(A)if there is a lack of some other doctor to testify
(B)unless there will be another doctor to testify
(C)without another doctor's testimony
(D)should there be no testimony from some other doctor
(E)lacking another doctor to testify
2.Samuel Sewall viewed marriage, as other seventeenth-century colonists, like a property arrangement rather than an emotional bond based on romantic love.(A)Samuel Sewall viewed marriage, as other seventeenth-century colonists, like a property arrangement rather than
(B)As did other seventeenth-century colonists, Samuel Sewall viewed marriage to be a property
arrangement rather than viewing it as
(C)Samuel Sewall viewed marriage to be a property arrangement, like other seventeenth-century
colonists, rather than viewing it as
(D)Marriage to Samuel Sewall, like other seventeenth-century colonists, was viewed as a property arrangement rather than
(E)Samuel Sewall, like other seventeenth-century colonists, viewed marriage as a property arrangement rather than
3.Under the Safe Drinking Water Act, the Environmental Protection Agency is required either to approve individual state plans for controlling the discharge of wastes into underground water or that they enforce their own plan for states without adequate regulations.(A)that they enforce their
(B)for enforcing their
(C)they should enforce their
(D)it should enforce its
(E)to enforce its
4.Last year, land values in most parts of the pinelands rose almost so fast.and in some parts even faster than what they did outside the pinelands.(A)so fast, and in some parts even faster than what they did
(B)so fast, and in some parts even faster than, those
(C)as fast, and in some parts even faster than, those
(D)as fast as, and in some parts even faster than, those
(E)as fast as, and in some parts even faster than what they did
5.In the mid-1960's a newly installed radar warning system mistook the rising of the moon as a massive missile attack by the Soviets.(A)rising of the moon as a massive missile attack by the Soviets
(B)rising of the moon for a massive Soviet missile attack
(C)moon rising to a massive missile attack by the Soviets
(D)moon as it was rising for a massive Soviet missile attack
(E)rise of the moon as a massive Soviet missile attack
Answer to Question 1
Only C, the best choice, manages to convey the meaning of the sentence efficiently and idiomatically.Choices A and D are plagued by awkwardness and wordiness.Choice A also introduces the unidiomatic phrase lack of some other doctor.Choice B incorrectly uses a future-tense verb(will be)in the if clause;the if clause must use the present tense if it is preceded, as here, by a result clause that uses a future-tense verb(e.g., will find).Choice E introduces a dangling modifier: the lacking...phrase cannot logically modify damage, the nearest noun.Answer to Question 2
In E, the best choice, a modifying phrase begun by like immediately follows the name it modifies, Samuel Sewall.E also uses the idiomatic construction viewed marriage as....Choice A inserts an adverbial modifier, as other...colonists, without the necessary did.It also uses the unidiomatic construction viewed marriage like....Both B and C use the unidiomatic construction viewed marriage to be....C incorrectly places the adjective phrase like other...colonists after the word arrangement, which it cannot logically modify.D offers a confusing and awkward passive construction marriage to.Samuel Sewall...was viewed....Answer to Question 3
E, the best choice, is the only one that maintains grammatical parallelism by using an infinitive--to enforce—to complete the construction either to approve...or....All of the other choices offer syntactic structures that are not parallel to the infinitive phrase to approve.In addition, choices A, B, and C use plural pronouns(they and their)that have no grammatical referents.Answer to Question 4
The properly completed sentence here must(1)use the proper form of the comparative conjunction, as fast as;(2)enclose the parenthetical statement and...even faster than in commas;and(3)preserve parallel structure, clarity of reference, and economy by using those to substitute for land values in the completed comparison.D, the best choice, does all these things correctly.A and B use so unidiomatically in place of as.A and E omit the comma needed after than and use the confusing and unparallel what they did instead of those.C omits the second as needed in the comparative conjunction as fast as.Answer to Question 5
Choice B is best because it alone correctly handles the idiom to mistake x for y.Though choice D manages the correct preposition, for, the phrase the moon as it was rising for is less efficient and precise than the phrasing of choice B: since rising functions as a verb in D, the phrase for a massive...attack now seems to modify rising rather than mistook.Choice C incorrectly uses mistook...to, and choices A and E incorrectly use mistake...as.Choice E also employs the nonidiomatic rise of the moon.以上就是小編整理的關(guān)于SAT語法句子改錯(cuò)題解析的相關(guān)內(nèi)容,很多情況下SAT語法句子改錯(cuò)題不是讓你選擇一個(gè)完全正確的答案,而是讓你選擇一個(gè)最佳答案??赡芪鍌€(gè)選項(xiàng)都是錯(cuò)誤的,但是你需要從這五個(gè)選項(xiàng)里面選擇一個(gè)錯(cuò)誤相對(duì)來說最小的選項(xiàng),它就是正確答案。
第五篇:詳細(xì)解析新SAT寫作
詳細(xì)解析新SAT寫作
新SAT寫作作為選考出現(xiàn),但由于美國前50所名校要求申請(qǐng)者具備SAT寫作成績,那么目標(biāo)遠(yuǎn)大的考生們就必須做好相關(guān)準(zhǔn)備。與以前的寫作部分相比,新SAT寫作不需要考生針對(duì)某個(gè)觀點(diǎn)或現(xiàn)象給出主觀態(tài)度,它上升到賞析層面,這相當(dāng)于把一篇閱讀能出題的地方用連貫的文章呈現(xiàn)出來。從評(píng)分標(biāo)準(zhǔn)上來看,閱讀、分析及寫作三個(gè)項(xiàng)目各占8分,滿分8,8,8分。
就第一個(gè)項(xiàng)目閱讀而言,SAT寫作要求考生必須盡量在十分鐘內(nèi)讀完一篇長達(dá)650-750詞的議論文。這是決定接下來的分析及寫作是否有效的關(guān)鍵。在讀文章時(shí),考生要準(zhǔn)確識(shí)別出這篇文章的論點(diǎn)、論據(jù)、論證方法及明顯的修辭手法。這一點(diǎn)與閱讀部分的考查的目的題、主旨題相同,考生需要明確目標(biāo)文章使用了哪些論據(jù)--數(shù)據(jù)、引用、個(gè)人經(jīng)歷等;哪些論證方法--對(duì)比論證、例證、因果論證等;哪些修辭手法--類比、明喻或者暗喻、重復(fù)等,這些專業(yè)術(shù)語的識(shí)別及拼寫必須在考前滾瓜爛熟掌握。不過好消息是每篇文章的前后會(huì)給出提示性文字分別介紹文章的題目與論點(diǎn),這為考生分析文章點(diǎn)亮明燈。
而針對(duì)第二個(gè)項(xiàng)目--分析,則需要考生能全面評(píng)價(jià)作者如何通過論據(jù)、論證及修辭手法的運(yùn)用來支持論點(diǎn)。SAT寫作這一項(xiàng)目往往是考生自以為簡單,但實(shí)際上很難拿高分。既然是分析,就一定要有理有據(jù)有節(jié),它需要結(jié)合閱讀理解及考生的分析能力,切勿出現(xiàn)主觀評(píng)判、無序拼接、張冠李戴。由于大部分學(xué)生都從未接觸過賞析英文的培訓(xùn),最快上手的方法是參考官方指南上的高分范文,從而學(xué)會(huì)評(píng)價(jià)作者如何使用各種論據(jù)、論證方法、修辭手法來支持論點(diǎn)。但這并不意味著我們要把文章中所有使用的以上三點(diǎn)都寫出來,由于時(shí)間有
新通教育
004km.cn
限,我們只用把占篇幅最大或特征最明顯的要點(diǎn)呈現(xiàn)出來即可,官方指南明確表示把點(diǎn)寫透比把點(diǎn)寫全要更能得高分。
針對(duì)第三個(gè)部分,考生要能寫出一篇流利、完整的評(píng)價(jià)。流利意味著語句通順,句子、段落之間邏輯銜接;完整意味著有開頭段、主體段及結(jié)尾段。考生在準(zhǔn)備SAT寫作部分時(shí),首先要積累的是豐富多樣的句型,這類評(píng)述型句型可在各類流行社論、書評(píng)里摘抄。然后確定一個(gè)合理的文章結(jié)構(gòu),除開頭結(jié)尾段外,主體段該安排幾個(gè),每個(gè)段落該如何展開。官方指南上的滿分文章寫了五段,我們可以分析其中的第三段:第一句是本段主題句,提出Summers使用論據(jù)來說服讀者使用塑料袋是正確的行為;第二句依次列舉Summers引用的重要機(jī)構(gòu)及權(quán)威專家;第三句評(píng)價(jià)引用權(quán)威對(duì)提升論點(diǎn)可信度的作用;第四句列舉原文提到的數(shù)據(jù);第五句評(píng)價(jià)提供數(shù)據(jù)的作用;第六句通過雙重否定體強(qiáng)調(diào)論據(jù)對(duì)議論文可信度的重要。這樣的主體段落結(jié)構(gòu)清晰,要點(diǎn)全面,有理有據(jù),必然是滿分。
50分鐘內(nèi)寫完這樣一篇完整、流暢的評(píng)論需要考生具備快速的閱讀、分析、寫作速度,其中提高寫作速度為重中之重。有規(guī)律的反饋性寫作練習(xí)正是唯一的解決方案。前期在準(zhǔn)備句型、分析文章時(shí)需要一個(gè)月左右,到了開始練習(xí)文章寫作時(shí),每天練習(xí)一篇雷打不動(dòng),到了考前一個(gè)月必須要開始每天計(jì)時(shí)寫一篇。所謂反饋性在于寫的每一篇文章都要有專業(yè)修改,這可以幫助考生意識(shí)到忽略的評(píng)論要點(diǎn)和誤區(qū)。練習(xí)時(shí)筆者建議依然使用與閱讀部分相同的資源。
以上我們對(duì)新SAT寫作根據(jù)閱讀、分析、寫作的評(píng)分標(biāo)準(zhǔn)進(jìn)行了詳細(xì)的分析,并給出了每部分的具體聯(lián)系方法,你明白了嗎?
新通教育
004km.cn
新通教育 004km.cn