單項選擇題A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of （）.

A.descriptive statistics
B.inferential statistics
C.nonparametric statistics
D.wishful thinking


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1.單項選擇題Which of the following statements is not true？（）

A.One form of descriptive statistics uses graphical techniques
B.One form of descriptive statistics uses numerical techniques
C.In the language of statistics，the term population refers to a group of people
D.Statistical inference is used to draw conclusions or inferences about characteristics of populations based on sample data

2.單項選擇題Descriptive statistics deals with methods of（）

A.organising data.
B.summarising data
C.presenting data in a convenient and informative way
D.doing all of the above

4.單項選擇題A summary measure that is computed from a sample to describe a characteristic of the population is called（）

A.a parameter
B.a statistic
C.a population
D.Both A and C are correct，since they are the same