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Cutie🍒 · 2020年03月20日

问一道题:NO.PZ2017092702000040

问题如下:

A mutual fund has the return frequency distribution shown in the following table.

Which of the following statements is correct?

选项:

A.

The relative frequency of the interval "–1.0 to +2.0" is 20%.

B.

The relative frequency of the interval "+2.0 to +5.0" is 23%.

C.

The cumulative relative frequency of the interval "+5.0 to +8.0" is 91.7%.

解释:

A is correct.

The relative frequency is the absolute frequency of each interval divided by the total number of observations. Here, the relative frequency is calculated as: (12/60) × 100 = 20%. B is incorrect because the relative frequency of this interval is (23/60) × 100 = 38.33%. C is incorrect because the cumulative relative frequency of the last interval must equal 100%.

这道题不太理解,麻烦讲解下,谢谢。

1 个答案

星星_品职助教 · 2020年03月20日

同学你好,

请明确具体不理解的地方

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