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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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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。

第3問 次の英文を読んで、 設問に答えなさい。 AThe Working Time Regulations (WTRS) introduced a new right to paid holidays for most workers, However, some workers were not covered when the WTRS came into force in October 1998. Since the regulations were amended, with effect firom 1 August 2003. the majority of these workers have been entitled to paid holidays, and since 1 August 2004 the regulations have also applied to junior doctors. Workers who qualify are entitled to no fewer than four weeks of paid holiday a year, and public holidays (normally eight days in England and Wales) count towards*1 this. However, workers and employers can agree upon longer holidays. For the first year of work, special accrual*2 rules apply. For each month ofemployment, workers are entitled to one twelfth of the annual holiday. After the first year of employment, you can take your holiday entitlement at any time, with your employer's approval. A) Before taking holidays, you must give your employer notice of at least twice the length of the holiday you want to take: for instance, to takea five-day holiday, you must give at least ten days' notice. If your employer does not want you to take that holiday, they can give you counter-notice equal to the holiday 一 for example, five days' notice not to take a five-day holiday. If the employer wants you to take holiday at a given time, e.g. when there is a shutdown at the same time everyyear, they must give you notice of at least twice the length of the holiday. There is no right for the worker to take that holiday at a different time. Holiday cannot be carried over to the next year, unless your contract of employment allows this to happen. Nor can you be paid in lieu of*3 your holiday. However, when you leave the job, you are entitled to receive payment for any outstanding*4 holiday, provided your contract specifically allows for this. It may be that your contract gives you better rights, or your holiday rights might be specified in a collective agreement. Your union representative can advise you on this. 【出典】 Cambridge English IELTS 8, Cambridge University Press, 2011, p.110を一部 改変。 *1 count towards ~ : ~に算入される *2accrual: 付加, 自然増加 *3 in lieu of: ~の代わりに *4outstanding : 未処理の

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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。

第3問 次の英文を読んで、 設問に答えなさい。 AThe Working Time Regulations (WTRS) introduced a new right to paid holidays for most workers, However, some workers were not covered when the WTRS came into force in October 1998. Since the regulations were amended, with effect firom 1 August 2003. the majority of these workers have been entitled to paid holidays, and since 1 August 2004 the regulations have also applied to junior doctors. Workers who qualify are entitled to no fewer than four weeks of paid holiday a year, and public holidays (normally eight days in England and Wales) count towards*1 this. However, workers and employers can agree upon longer holidays. For the first year of work, special accrual*2 rules apply. For each month ofemployment, workers are entitled to one twelfth of the annual holiday. After the first year of employment, you can take your holiday entitlement at any time, with your employer's approval. A) Before taking holidays, you must give your employer notice of at least twice the length of the holiday you want to take: for instance, to takea five-day holiday, you must give at least ten days' notice. If your employer does not want you to take that holiday, they can give you counter-notice equal to the holiday 一 for example, five days' notice not to take a five-day holiday. If the employer wants you to take holiday at a given time, e.g. when there is a shutdown at the same time everyyear, they must give you notice of at least twice the length of the holiday. There is no right for the worker to take that holiday at a different time. Holiday cannot be carried over to the next year, unless your contract of employment allows this to happen. Nor can you be paid in lieu of*3 your holiday. However, when you leave the job, you are entitled to receive payment for any outstanding*4 holiday, provided your contract specifically allows for this. It may be that your contract gives you better rights, or your holiday rights might be specified in a collective agreement. Your union representative can advise you on this. 【出典】 Cambridge English IELTS 8, Cambridge University Press, 2011, p.110を一部 改変。 *1 count towards ~ : ~に算入される *2accrual: 付加, 自然増加 *3 in lieu of: ~の代わりに *4outstanding : 未処理の

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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。

第3問 次の英文を読んで、 設問に答えなさい。 The Working Time Regulations (WTRS) introduced a new right to paid holidays for most workers. However, some workers were not covered when the WTRS came into force in October 1998. Since the regulations were amended, with effect from 1 August 2003, the majority of these workers have been entitled to paid holidays, and since 1 August 2004 the regulations have also applied to junior doctors. Workers who qualify are entitled to no fewer than four weeks of paid holiday a year, and public holidays (normally eight days in England and Wales)count towards*1 this. However, workers and employers can agree upon longer holidays. For the first year of work, special accrual*2 rules apply. For each month ofemployment, workers are entitled to one twelfth of the annual holiday. After the first year of employment, you can take your holiday entitlement at any time, with your employer's approval. A Before taking holidays, you must give your employer notice of at least twice the length of the holiday you want to take: for instance, to take a five-day holiday, you must give at least ten days' notice. If your employer does not want you to take that holiday, they can give you counter-notice equal to the holiday for example, five days' notice not to take a five-day holiday. If the employer wants you to take holiday at a given time, e.g. when there is a shutdown at the same time every year, they must give you notice of at least twice the length of the holiday. There is no right for the worker to take that holiday at a different time. Holiday cannot be carried over to the next year, unless your contract of employment allows this to happen. Nor can you be paid in lieu of*3 your holiday. However, when you leave the job, you are entitled to receive payment for any outstanding*4 holiday, provided your contract specifically allows for this. )It may be that your contract gives you better rights, or your holiday rights might be specified in a collective agreement. Your union representative can advise you on this. 【出典】 Cambridge English IELTS 8, Cambridge University Press, 2011, p.110を一部 改変。 *1 count towards ~ : ~に算入される *2accrual : 付加, 自然増加 *3 in lieu of: ~の代わりに *4outstanding: 未処理の

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Contemporary writings Senior High

最後の文の「魔法のような領域を広げていった」とはどう言うことですか?

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Contemporary writings Senior High

全然埋まらなくて困ってます... 回答を持っていないので穴埋めの答えを教えていただきたいです🙏

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