特别注意以下两种最可能考的情况:
j为0,即k%恰为整数,则结果恰为第个数
第个数与第个数相等,不用算也知道正是这两个数。
注意:我前面提到的Quartile也可用这种方法计算,
其中1st Quartile的k%=25%
2nd Quartile的k%=50%
3rd Quartile的k%=75%
计算结果一样。
例:
{1,3,4,5,6,7,8,9,19,29,39,49,59,69,79,80}共16个样本
30%:30%=4.5=4+0.5
第5个数+0.5第6个数=0.56+0.57=6.5
75%:1575%=11.25=11+0.25
第12个数+0.25第13个数=0.7559+0.2569=51.5
The Vacuum Cleaner Filter(1)
The Chipped Teeth
The Horrible Face (2)
The Horrible Face (1)
Let’s Speak English
I’m Pregnant
New Law for Taco Trucks
The Marathon Cheater
A Practical Joke
The little red bus
The Demanding Son
The Vacuum Cleaner Filter(2)
Late for soccer
The Driving Lesson (2)
Shut Your Mouth
The Refund (1)
The island picnic
Brave Triceratops
Feds Threaten WWII Vet
Honoring G.W. Bush
Happy Anniversary
The Rude Clerk
The lion and the mouse
The Cyclone in Myanmar
The Bargain CD Set (1)
Locked out
The Bloody Forehead
Pepper's adventure
TSA’s New Policy
It’s All Over
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |