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数学 高校生

例題も練習問題もデータの値を2倍した時の分散を求めるのに、どちらも2の二乗が使われているのはなぜですか?

(A半)率3の合 変量の変換 第5章 データの分析 例題 12 次のデータは,ある生徒5人の数学の試験の得点を記録したものである。 7, 3, 8,2, 10 (点) (1) このデータの平均値と分散を求めよ。 (2) 5人全員の得点それぞれに 10を加えたデータの平均値と分散を求めよ。 (3) 5人全員の得点をそれぞれ2倍にしたデータの平均値と分散を求めよ。 【類仁愛大) 変量の変換を用いて,見通しよく計算する 考え方 変量x,yについて,y=ax+b (a, bは定数)であるとき, x, yのデータの平均値をx, y, 分散を s, s,, 標準偏差を S, s, とすると →(2)では a=1, b=10, (3) では a=2, 6=0 と考えて, (1) の結果を利用する。 ソ=ax+6, s,"=a's., s,=|a|s. ポイント (解答 1 定義から求める 1 -(7+3+8+2+10) = 30 -=6 (点) 圏 5 (1) 平均値は (7-6)°+(3-6)+(8-6)*+(2-6)°+(10-6)")= =9.2 匿 分散は 46 5 2 (1)の結果を利用 →(2) 5人全員の得点それぞれに 10を加えたときの平均値は 6+10=16(点) 器 分散は,(1)と同じで 9.2 容 (1)の結果を利用 → (3) 5人全員の得点をそれぞれ2倍したときの平均値は 2?×9.2=36.8 圏 2×6=12(点) 闇 月 分散は 練習 10個の値からなる次のデータについて考える。 12 10, 6, 9, 4, 7, 2, 3, 5, 1, 3 (1) このデータの平均値,分散, 標準偏差を求めよ。 (2) このデータの値それぞれに3を加えたデータの平均値, 分散, 標準偏差を求めよ。 (3) このデータの値をそれぞれ2倍したデータの平均値, 分散, 標準偏差を求めよ。 【類京都学園大) Aからまで最

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数学 高校生

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16 次の(A), (B)の問いに答えなさい。 (A 次の英文を読んで, 文意が通じるように, 2回~16時に入れるのに最も適切な語(旬) を0~ から1つずつ選び, 番号で答えなさい。 In 2019, the Rugby World Cup was held in Japan. Rugby wasn't very popular among Japanese people until just a few years ago. In the *previous World Cup in 2015, Japan won a game against South Africa in a dramatic *upset victory. And in this World Cup, Japan reached the final eight. The Japanese national team made history and has 0 taken 5@ brought Do you know who started Japan's *bid to host the Rugby World Cup? There was a man who had a great passion for rugby. He was a * diplomat named Katsuhiko Oku, In 2003, he was suddenly attacked and killed by *terrorists in *Iraq, He was 290 engaged O prepared He started playing rugby at a public high school in Hyogo. He also showeda great talent for rugby at Waseda University. At that time, he had a dream to be a diplomat and work internationally in the future. After deep *consideration, he decided to 30O continue to However, he *encountered rugby again at Oxford University, and he tried hard to 15 develop his skills there. He became the first Japanese player of the Oxford rugby team. After that, he kept his love for rugby in his heart and *devoted himself to Japanese rugby while he worked on the 31) | 0 social Six years after his death, it was decided that the Rugby World Cup would be held in Japan. O given rugby into the hearts and minds of Japanese people. O satisfied in *reconstruction support activities for Iraq. 10 @ keep off O give up rugby then. O necessary O international stage. [注) previous (前の) terrorist(テロリスト) consideration(熟慮) upset(番狂わせ) Iraq(イラク) encounter . (……に出会う) bid (宣言 reconstf uction (復興) diplomat (外交官) devote oneself to (…に身を捧げる)

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英語 高校生

リードB持っている方不定詞のステップ1の解答送っていただけませんか? 学校で解答冊子持ってくるの忘れてしまって、。お願いいたします。

不定詞 STEP O 1(to-不定詞の名詞的用法·形容詞的用法·副詞的用法》 次の各文の to-不定詞が,名詞的用法 ならア,形容詞的用法ならイ,副詞的用法ならウと答えなさい。 (1) It is a pity to be indoors on a day like this. (2) Children go to school to learn things. (3) Iwant to buy a book oto read on the journey. 09 (4) Don't you think it wrong to tella lie to your friend? J0 J ( (5) His son grew up to be a very sociable man. (6) She had the courage to say no. (7) He must be a fool to act in that way. (8) There was no time for her to call on her aunt. 2(to-不定詞の名詞的用法〉 次の各文の to-不定詞の働きが,主語ならア, 目的語ならイ, 補語 ならウと答えなさい。 ena JD 9ge to forget all. (2) It is hard to criticize the people you like. To know all is Jの ( (3) I forgot to mail your letter. (4) Do you think it strange for me to live by myself? JpO pe 3(to-不定詞の形容詞的用法〉次の各文の下線部を to-不定詞を用いた形にして,全文を書きか えなさい。 (1) This is the best way of curing a cold. E 0~ ( ゆ) (2) He was the last person who left the office. DIg 2or (3) He has no friends who will support him. 1ore stgin (4) This apron has no pocket in which I can put things. 4(to-不定詞の副詞的用法〉 次の各文を[ ]内の指示に従って書きかえなさい。 (1) Her coach was disappointed when he heard of her failure. (下線部を to-不定詞を用いて) [only to ~ (2) We hurried to the house but found that it was empty. (21出孝 to ~を用いて) (3) This bag is so small that it cannot hold all these things. [too (4) This book is so easy that a six-year-old child can read it. [ enough to ~ を用いて) 語 注 no pocket in which I can put things 私がものを入れられるポケット(がない) 19

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