求一英文数学题

你好～～～

a)

Marks belowCumulative frequency table0.5010.5320.51130.52140.53350.540

b) 請到以下網址自行下載看看︰

http://cnet.hk/upload/index.php/files/get/tjtRW1pFD9/graph.jpg

c) Lower quartile = 總數 * 25% = 40 * 25% = 10

Median = 總數 * 50% = 40 * 50% = 20

Upper quartile = 總數 * 75% = 40 * 75% = 30

According to the graph downloaded,

Lower quartile is approximately 19 marks.

Median is about 29 marks.

Upper quartile is approximately 38 marks.

希望以上資料可以幫到你～～～～～