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数学 高校生

これ と書いてあるところの6は何の6ですか? この式の役割も教えてください😭 カッコ2番が全体的にわかりません

統合したデータの総和, 偏差の2乗の総和から平均値と分散を求める。 であり,残りの6個のデータの平均値は 8,標準偏差は5である。(広島エ 12個のデータがある。そのうちの6個のデータの平均値は4, 標編差は それぞれのグループのデータの総和, 偏差の2乗の総和を (2)(分散)=(2乗の平均値)-(平均値 9/3 224 基本例題 145 データの統合による平均値と分散 O000 備急は 基本例 次のデー (1) 全体の平均値を求めよ。 (2) 全体の分散を求めよ。 こ。 こ CHART OSOLUTION データの統合 正し した する める CHAR (データの総和) (データの大きさ) (1)(平均値)= 解答 (1) 2つのデータのグループをそれぞれ A, Bとすると 沖 Aグループのデータの総和は 4×6=D24 Bグループのデータの総和は 8×6348 ゆえに,全体のデータの総和は24+48=72 データの大きさは12であるから,求める全体の平均値は (データの総和 =(平均値) x(データの大きさ) 解答 (1) この 72 =6 12 合 A, Bのデータの大き が同じであるから、当 の平均値は、 4+8 (2) デー 2 (2) Aグループのデータの2乗の平均値をaとすると 3=a-4 から a=9+16=25 Bグループのデータの2乗の平均値をbとすると 5°=b-8° から 6=25+64=89 としてもよい。 1mm よっ (分散)= (2乗の平均働-(平確 比べー また。 ゆえに, 全体の2乗の平均値は 25×6+89×6 全体の2乗の総は 修 -57 修 12 よって,求める全体の分散は 57-6°=21 a×6+bx6 (分散)= (2乗の平均働-( ゆえ 比べ PRACTICE…145 PRA. ある集団はAとBの2つのグ プー曲

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数学 高校生

英語の長文ってどうやったら読めるようになりますか

1 次の英文を読んで、問 (1) ~ (5) に且本語で答えなさい。 Lobola is the African custom of paying fora bride. Although it is an old custom, not In fact, it is being debated in Botswana. everyone in African cultures is happy with it. Many people, including many women, support payment of lobola. They explain that in Tswana culture, a marriage means joining a family, not just marrying an individual. The idea of marrying into a family is very African. just the man.Through marriage, the young woman's family loses their daughter as she then becomes a part of her husband's family. Lobola is a way to show thanks. It is a form of generosity in African culture. In its traditional form, they also explain, the groom's family gave cattle to the bride's family. But it didn't matter whether the family owned cattle or not. A woman does not get married to A man only had to pay what he could afford if he had no cattle, he could give something else, even the smallest form of payment. The tradition of lobola was a matter of pride. Today, lobola is often given in cash. purchase of a bride. Lobola is meant to join two families together. They know that But its supporters say it is not about the some people abuse the custom. But they believe that the tradition should not be tossed out because it has many positive effects. Rather than get rid of it, many believe it should just be explained better. However, many others say this custom should be stopped. They think it has become commercialized. Families make lots of demands on the groom. They think this makes lobola look very bad. They argue that in Africa's past, a girl was an asset at home. and other household chores. She did the cooking When a family lost that child through marriage, it demanded payment. Today, they think that lobola has changed into a useless tradition. In this custom, a man is buying the right to control a woman. They say women are individuals with rights. In today's world, parents do not have to be paid for a bride because their male and female children are equal. They all work and make contributions to the household. They believe that paying lobola makes it seem like a man is buying a pair of shoes or a bicycle, instead of getting married. They also argue that it is often a financial burden for couples. It is too difficult for many people to pay the price asked. So, is lobola a rich tradition, bringing families together? Or is it an ugly custom of buying women? This debate continues in Botswana, as does the custom.

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