Grade

Type of questions

Mathematics Senior High

この問題って恐らく①の方を使ってると思うんですけど、最後の集合全体の分散で1/nを使ってますよね? これって公式に当てはまらなくなりませんか?😭😭😭

基本例題178 平均値 分散… 2つのデータを合わせる OOO00 28 る集団はAとBの2つのグループで構成さ グループ|| 個数 平均値 分散 |れている。データを集計したところ,それぞれ |のグループの個数,平均値,分散は右の表のよ | うになった。このとき, 集団全体の平均値と分散を求めよ。 A 20 16 24 B 60 12 28 立命館大) 大人のこ。tであケす 基本177 5 指針>テ データ xi, X2, Xnの平均値をx,分散を s?とすると, 10 (公式) s=xー(x) ーの が成り立つ。公式を利用して,まず,それぞれのデータの2乗の総和を求め,再度,公式 を適用すれば,集団全体の分散は求められる。 この方針で求める際,それぞれのデータの値を文字で表すと考えやすい。下の解答では, A, Bのデータの値をそれぞれ x1, X2, なお,慣れてきたら,データの値を文字などで表さずに,別解のようにして求めてもよい。 X20 ; V, V2,:…, Voo として考えている。 解答 集団全体の平均値は 20×16+60×12 (集団全体の総和は 20×16+60×12 20+60 =13 Aの変量をxとし,データの値を x1, X2, また,Bの変量をyとし,データの値を yy, V2,………, Voo とする。 * yのデータの平均値をそれぞれx, yとし,分散をそれぞれ s?, sfとする。 s3=x-(x)より, X20 とする。 x-s+(x)であるから +x2+……+x20°-20×(24+16°)=160×35 の 3-y-(Gより,y=s°+(y)であるから 要の均 y?+y2?+..··+yo°=60×(28+12°)=240×43。 よって,集団全体の分散は 集団全体の平均値は 13 (x+x°+……………+x20°+y?+y?+……+Vo)-13 160×35+240×43 080 20+60 -169=30 20×16+60×12 ,=13 Aのデータの2乗の平均値は 24+16° であり, Bのデータの2乗の平均値は28+12"で あるから,集団全体の分散は 集団全体の平均値は Tosos 20+60 160×35+240×43 80 -169=30 20×(24+16)+60×(28+12") 20+60 -13°= 催信美は3であ の 2 と標準偏差、相関係数

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Mathematics Senior High

赤本の問題ですが答えがないので、正解しているか教えてほしいです🙇小論文ですが、基本的な学力を試すために数学の問題があります。第一問までを確認してほしいです。

山形大一前期 56 2018年度 小論文 小論文 地域教育文化(地域教育文化一児童教育) 学部> 90 分 (解答例省略, 第1問 ある高校で3年生 100人に次の数学の間題 (問題1,2) と質問に答えてもらいました。 その結果は、結果1~4のとおりでした。 あとの間い(問1~問2)に答えてください。 【問題と質問) 問題1:三辺の長さがそれぞれ10cm, 12cm, 2、、T cmの三角形の面積を求めてください。 問題2:実数x, yがy=4x+8 を満たしているとき, xとyの積の最小値を求めてください。 質問:あなたは勉強を頑張っていますか? はい/いいえ 【結果) 結果1:問題1に正答した生徒の人数 80人 結果2:問題2が不正答だった生徒の人数 30人 結果3:全員が問題1もしくは問題2の少なくとも一方に正答した。 結果4:質問に 「はい」 と答えた生徒の人数 45人。 また, その全員が問題1および問題2の両方 に正答した。 問1 上記の問題1および問題2の解を答えてください。 問2 結果1~4をもとに, 次のア~ウの記述について確実に成り立つものに O を, そうでない ものには × を解答欄に記入してください。 ア 問題1に正答した生徒全体からなる集合と, 問題2に正答した生徒全体からなる集合 の共通部分は, 質問に 「はい」 と答えた生徒全体からなる集合である。

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English Senior High

英語に自信がある人回答づくりお願いします! ※書き込みは気にしないでください。 これプラス、問題に続きがあって、 問5 本文には、実物の動物を見ることによって人々がより深く理解できることが3つ書かれています。それらを日本語で答えなさい。 問6 本文には、動物園... Read More

第4問 次の英文を読んで、 設問に答えなさい。①~6は段落番号です。 黒体 6) のIn my view, (1)it_is perfectly possible for many species of animals living in gon.. ie parks to have a quality of life as high as, or higher than, in the wild. 'Animals in ood z0os get a varied and high-quality diet with all the supplements required. and anv 1pesses they might have will be treated.Their movement might be somewhat restricted. mt they have a safe environment in which to live, and they are spared bullying and social 神年 predators*2 or the irritation and pain of parasites or injuries. The average captive animal racism*1 by others of their kind. They do not suffer from the threat or stress of will have a greater life expectancy compared with its wild counterpart, and will not die of drought, of starvation or in the jaws of a predator. Alot of very nasty things happen to truly wild' animals that simply don't happen in good zoos, and to view a life that is 'free' as 術保者一 one that is automatically ‘good' is, I think, an error. Furthermore, zoos serve several key purposes. の Firstly, zoos aid conservation. Colossal numbers of species are becoming extinct across the world, and many more are increasingly threatened and therefore risk extinction. Moreover, some of these collapses have been sudden, dramatic and unexpected, or were simply discovered very late in the day. Aspecies protected in captivity can be bred up to provide a reservoir*3 population against a population crash or extinction in the wild. A good number of species only exist in captivity, with many ofthese livinginzoos. Stillmore only exist in the wildbecause they have been reintroduced from zoos, or have wild populations that have been1o0osted by captive bred animals Without (2these efforts there would be fewer species alive today. Although reintroduction successes are few and far between*4, the numbers are increasing, and the very fact that species have been saved or reintroduced as a result of captive breeding proves the value of such initiatives. ③ Zoos alsoprovide education. Many children and adults, especially those in cities, will never see a wild animal beyond a fox or pigeon. While it is true that television documentaries are becoming ever more detailed and impressive, and many natural history specimens are on display in museums, there really is nothing to compare with seeinga living creature in the flesh*5, hearing it, smelling it, watching what it does and having the time to absorb details. That alone will bring a greater understanding and perspective to many, and hopefully give them a greater appreciation for wildlife, conservation efforts and how they can contribute. ④ Inaddition to this, there isalsothe education that cantake place in Z0Osthrough signs, talks and presentations which directly communicate information to visitors about the animals they are seeing and their place in the world. This was an area where zoos used to be lacking, but they are now increasingly sophisticated in their communication and 8.

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English Senior High

英語に自信がある人回答づくりお願いします! ※書き込みは気にしないでください。 これプラス、問題に続きがあって、 問5 本文には、実物の動物を見ることによって人々がより深く理解できることが3つ書かれています。それらを日本語で答えなさい。 問6 本文には、動物園... Read More

第4問 次の英文を読んで、 設問に答えなさい。①~6は段落番号です。 黒体 6) のIn my view, (1)it_is perfectly possible for many species of animals living in gon.. ie parks to have a quality of life as high as, or higher than, in the wild. 'Animals in ood z0os get a varied and high-quality diet with all the supplements required. and anv 1pesses they might have will be treated.Their movement might be somewhat restricted. mt they have a safe environment in which to live, and they are spared bullying and social 神年 predators*2 or the irritation and pain of parasites or injuries. The average captive animal racism*1 by others of their kind. They do not suffer from the threat or stress of will have a greater life expectancy compared with its wild counterpart, and will not die of drought, of starvation or in the jaws of a predator. Alot of very nasty things happen to truly wild' animals that simply don't happen in good zoos, and to view a life that is 'free' as 術保者一 one that is automatically ‘good' is, I think, an error. Furthermore, zoos serve several key purposes. の Firstly, zoos aid conservation. Colossal numbers of species are becoming extinct across the world, and many more are increasingly threatened and therefore risk extinction. Moreover, some of these collapses have been sudden, dramatic and unexpected, or were simply discovered very late in the day. Aspecies protected in captivity can be bred up to provide a reservoir*3 population against a population crash or extinction in the wild. A good number of species only exist in captivity, with many ofthese livinginzoos. Stillmore only exist in the wildbecause they have been reintroduced from zoos, or have wild populations that have been1o0osted by captive bred animals Without (2these efforts there would be fewer species alive today. Although reintroduction successes are few and far between*4, the numbers are increasing, and the very fact that species have been saved or reintroduced as a result of captive breeding proves the value of such initiatives. ③ Zoos alsoprovide education. Many children and adults, especially those in cities, will never see a wild animal beyond a fox or pigeon. While it is true that television documentaries are becoming ever more detailed and impressive, and many natural history specimens are on display in museums, there really is nothing to compare with seeinga living creature in the flesh*5, hearing it, smelling it, watching what it does and having the time to absorb details. That alone will bring a greater understanding and perspective to many, and hopefully give them a greater appreciation for wildlife, conservation efforts and how they can contribute. ④ Inaddition to this, there isalsothe education that cantake place in Z0Osthrough signs, talks and presentations which directly communicate information to visitors about the animals they are seeing and their place in the world. This was an area where zoos used to be lacking, but they are now increasingly sophisticated in their communication and 8.

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English Senior High

英語に自信がある人回答づくりお願いします! ※書き込みは気にしないでください。 これプラス、問題に続きがあって、 問5 本文には、実物の動物を見ることによって人々がより深く理解できることが3つ書かれています。それらを日本語で答えなさい。 問6 本文には、動物園... Read More

第4問 次の英文を読んで、 設問に答えなさい。①~6は段落番号です。 黒体 6) のIn my view, (1)it_is perfectly possible for many species of animals living in gon.. ie parks to have a quality of life as high as, or higher than, in the wild. 'Animals in ood z0os get a varied and high-quality diet with all the supplements required. and anv 1pesses they might have will be treated.Their movement might be somewhat restricted. mt they have a safe environment in which to live, and they are spared bullying and social 神年 predators*2 or the irritation and pain of parasites or injuries. The average captive animal racism*1 by others of their kind. They do not suffer from the threat or stress of will have a greater life expectancy compared with its wild counterpart, and will not die of drought, of starvation or in the jaws of a predator. Alot of very nasty things happen to truly wild' animals that simply don't happen in good zoos, and to view a life that is 'free' as 術保者一 one that is automatically ‘good' is, I think, an error. Furthermore, zoos serve several key purposes. の Firstly, zoos aid conservation. Colossal numbers of species are becoming extinct across the world, and many more are increasingly threatened and therefore risk extinction. Moreover, some of these collapses have been sudden, dramatic and unexpected, or were simply discovered very late in the day. Aspecies protected in captivity can be bred up to provide a reservoir*3 population against a population crash or extinction in the wild. A good number of species only exist in captivity, with many ofthese livinginzoos. Stillmore only exist in the wildbecause they have been reintroduced from zoos, or have wild populations that have been1o0osted by captive bred animals Without (2these efforts there would be fewer species alive today. Although reintroduction successes are few and far between*4, the numbers are increasing, and the very fact that species have been saved or reintroduced as a result of captive breeding proves the value of such initiatives. ③ Zoos alsoprovide education. Many children and adults, especially those in cities, will never see a wild animal beyond a fox or pigeon. While it is true that television documentaries are becoming ever more detailed and impressive, and many natural history specimens are on display in museums, there really is nothing to compare with seeinga living creature in the flesh*5, hearing it, smelling it, watching what it does and having the time to absorb details. That alone will bring a greater understanding and perspective to many, and hopefully give them a greater appreciation for wildlife, conservation efforts and how they can contribute. ④ Inaddition to this, there isalsothe education that cantake place in Z0Osthrough signs, talks and presentations which directly communicate information to visitors about the animals they are seeing and their place in the world. This was an area where zoos used to be lacking, but they are now increasingly sophisticated in their communication and 8.

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