If a data set has an even number of observations, the median is the
average value of the two middle items. (
)
average value of the two middle items. (
)
举一反三
- In a data set, the number of observations will always be the same as<br/>the number of elements. ( <br/>)
- The median of a data set with 20 items would be the average of the 10th and the 11th items in the ordered array.
- The median of a data set with 20 items would be the average of the 10th and the 11th items in the ordered array. A: 正确 B: 错误
- The larger the number of observations in a numerical data set, the larger the number of class intervals needed for a grouped frequency distribution.
- True or False: The larger the number of observations in a numerical data set, the larger the number of class intervals needed for a grouped frequency distribution.