如果想要看到频率值的平均值、统计数、最大值和标准值，可以使用类似于清单8中的代码。

If you wanted to see the average, count, Max, and standard of the frequency values, you can use code similar to Listing 8.

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该研究使用食物频率问卷来追踪参与者每四年一次，关于多久一次，平均而言，每种水果他们所吃的量都是标准的。

The studies used food frequency questionnaires to follow up the participants every four years, asking how often, on average, they ate a standard portion of each fruit.

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对于力量与体重、肌电图的峰值、起始时间、峰值时间、中位频率、平均功率、和频段均进行标准化描述后进行统计计算。

The descriptive statistics for body weight normalized strength, normalized peak EMG, time to onset, time to peak, median frequency, mean power frequency, and frequency bands were calculated.

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