题目
题目
单项选择题

Two samples of students were asked to indicate the number of email messages they sent in the last 24 hours.  The responses given by each sample are shown in the table below.   Which one of the following statements about these samples is correct? (Note that if you have difficulties seeing the above table, you can download it here Download here )

选项
A.Sample #1 has a smaller IQR and a smaller median than Sample #2.
B.Sample #1 has a smaller IQR and a larger median than Sample #2.
C.Sample #1 has a larger IQR and a larger median than Sample #2.
D.Sample #1 and Sample #2 have the same IQR and the same median.
E.Sample #1 has a larger IQR and a smaller median than Sample #2.
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标准答案
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思路分析
To assess the statements about the two samples, I will first compute the key descriptive statistics for each sample. Sample #1 data (11 values): 0, 18, 7, 12, 9, 16, 1, 22, 34, 10, 5. Sort them: 0, 1, 5, 7, 9, 10, 12, 16, 18, 22, 34. The median is the 6th value, which is 10. For the IQR, the lower half (first 5) is 0, 1, 5, 7, 9 with median 5 (Q1), and the upper half (last 5) is 12, 16, 18, 22, 34 with median 18 (Q3). IQR =......Login to view full explanation

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