[問題] 一題統計問題和R的使用...
原文題目:
A multiple-choice quiz contains ten questions. For each question there are
one correct answer and four incorrect answers. A student gets three correct
answers on the quiz. Test the hypothesis that the student is guessing.
我試著翻譯:
有一個份都是選擇題的考卷,這份考卷有10題題目。
每個題目都只有一個選項是對的,四個選項是錯的。
有一個學生總共答對了三題。
請檢定這個假設:這學生是亂猜的 (α=0.05)
我想請問這題該怎麼算的?
我目前的想法是這樣
N=10 (樣本=10,有十題題目)
答對的機率是1/5=0.2
考生答對三題,所以B=3
請問要怎麼寫假說呢??我這樣寫對嗎?
Ho:P=0.2
H1:P>0.2
因為是雙尾,所以α要除以二,0.025
請問接下來怎麼算呢?
現在正在學R(剛開始第一個星期XD)
pbinom (3, 10, 0.2, F)
[1] 0.1208739
qbinom (0.025, 10, 0.2, F)=5
所以表示要> = 5,所以是6
請問這是指要答對6題或6題以上,才能表示學生不是用猜的嗎???
我真的非常非常弱,
拜託版上的朋友們幫幫忙吧~
真的非常感激^^
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