Cumulative Frequency Polygon 累積頻數多邊形的應用

Demonstrate the use of cumulative frequency polygons.

展示累積頻數多邊形的應用。

Answer the following questions using the applet.

(a) If the passing mark is 50, how many students fail in the test?

(b) If 50% of students pass the test what is the passing mark?

What is the passing mark if 70% of students pass the test?

(c) A prize will be given to the students who get 75 marks or above. How many students get the prize?

(d) If 8 prizes are to be given, what is the mark above or equal to which a prize would be given?

(e) How many students have marks between 55 and 75?

(a) 若測驗的合格分數為50，有多少名學生不合格？

(b) 若有50%的學生合格，合格分數應為多少？

若要有70% 的學生合格，合格分數應為多少？

(c) 若老師派發禮物給75分或以上的學生，有多少學生會得到禮物？

(d) 若老師要派發 8 份禮物，多少分或以上的學生可以得到禮物？

(e) 有多少學生的分數介乎 55 分至 75 分之間？

輸入其他數據並製作其累積頻數多邊形。