呃,其實我覺得你把這些題目好歹翻譯出來吧再給人解答么...今晚閑的慌就給你翻一下吧...但是解題是指望不了我的,俺一個文科生,沒學過概率.
另外,我同學說看這本書《概率論與數理統(tǒng)計》,用里面的公式很快能解完.
實在不行你拿上中文翻譯問個理科學生,應該能很快解決的.加油吧～
1.如果概率分布中,一個平均值為7.4且一個標準偏差為1.5,那么隨機變量值大于8的概率為多少? （翻譯成“一個”是因為我不知道概率分布有幾個平均值和標準偏差,如果只有一個那么這道題這樣翻譯：如果在概率分布中平均值為7.4且標準偏差為1.5,那么隨機變量值大于8的概率為多少）
2.總共有36個學生做同一份作業(yè),總分為100分.在判分后,發(fā)現全班的平均分為68.如果27個學生及格了（50分以上）,那么這份作業(yè)成績的標準偏差為多少?
3.根據問題2,大約有多少學生你認為他們及格的期望值達到40％或更高,但實際上他們仍未及格?
翻譯爛的話,不要bs俺,畢竟米學過高數,好多專業(yè)名詞都不會翻...ORZ
急求3道英文數學題,急急急!謝謝達人
急求3道英文數學題,急急急!謝謝達人
QUESTION 1
IF A PROBABILITY DISTRIBUTION HAS A MEAN OF 7.4 AND A STANDARD DEVIATION OF 1.5, WHAT IS THE PROBABILITY THAT A RANDOM VARIABLE WILL HAVE A VALUE GREATER THAN 8
QUESTION 2
A TOTAL OF 36 STUDENTS SUBMITTED AN ASSIGNMENT WORTH A TOTAL 100 MARKS. AFTER MARKING THE ASSIGNMENTS,IT WAS FOUND THAT THE ASSIGNMENT MARK MEAN FOR THE CLASS WAS 68.IF 27 STUDENTS PASSED(MARK OF 50 OR GREATER),WHAT IS THE STANDARD DEVIATION OF THE ASSIGNMENT MARKS?
QUESTION 3
FUTHER TO QUESTION 2, APPROXIMATELY HOW MANY STUDENTS WOULD YOU EXPECT TO HAVE ACHIEVED 40% OR GREATER ON THE ASSIGNMENT, BUT STILL FAILED?
QUESTION 1
IF A PROBABILITY DISTRIBUTION HAS A MEAN OF 7.4 AND A STANDARD DEVIATION OF 1.5, WHAT IS THE PROBABILITY THAT A RANDOM VARIABLE WILL HAVE A VALUE GREATER THAN 8
QUESTION 2
A TOTAL OF 36 STUDENTS SUBMITTED AN ASSIGNMENT WORTH A TOTAL 100 MARKS. AFTER MARKING THE ASSIGNMENTS,IT WAS FOUND THAT THE ASSIGNMENT MARK MEAN FOR THE CLASS WAS 68.IF 27 STUDENTS PASSED(MARK OF 50 OR GREATER),WHAT IS THE STANDARD DEVIATION OF THE ASSIGNMENT MARKS?
QUESTION 3
FUTHER TO QUESTION 2, APPROXIMATELY HOW MANY STUDENTS WOULD YOU EXPECT TO HAVE ACHIEVED 40% OR GREATER ON THE ASSIGNMENT, BUT STILL FAILED?
數學人氣：901 ℃時間：2020-02-25 16:34:34
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