NO.PZ2024120401000008
问题如下：
For the following data:
What is the IQR ?
选项：
A.
(0.2725, 0.33)
B.
(0.33, 0.5450)
C.
(0.2725, 0.5450)
D.
(0.2725, 0.4175)
解释：
This requires calculating the 25% and 75% levels. The 25% level is 5/20 = 25% of the way between ranked observations 2 and 3. Therefore: q25%=0.75 * 0.27+0.25 * 0.28=0.2725. Similarly, the 75% level is 75% of the way between observations 4 and 5: q75%=0.25 * 0.38+0.75 * 0.43=0.4175 Thus, IQR=(0.2725, 0.4175)
0.75×0.27+0.25×0.28中的0.25和0.75是如何确定的？谢谢老师