Read the passage carefully. There were two widely divergent influences on the early development of
Read the passage carefully.
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of governmental units (state and statistics come from the same Latin root. status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses-all of which led to modern descriptive statistics. From the influence of the father came modern inferential statistics, which is based squarely on theories of probability.
Descriptive statistics involves tabulating, depicting, and describing collections of data. These data may be either quantitative, such as measures of height, intelligence, or grade level-159 variables that are characterized by an underlying continuum-or the data may represent qualitative variables, such as sex, college major, or personality type. Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Descriptive statistics is a tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.
Inferential statistics is a formalized body of methods for solving another class of problems that present great difficulties for the unaided human mind. This general class of problems characteristically involves attempts to make predictions using a sample of observations. For example a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast have been vaccinated for flu. or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child; the proportion for the entire district could be estimated fairly accurately from a sample of as few as 100 children. Thus, the purpose of inferential statistics is to predict or estimate characteristics of a population from a knowledge of the characteristics of only a sample of the population.
Trả lời cho các câu 1, 2, 3, 4, 5, 6, 7, 8 dưới đây:
With what is the passage mainly concerned?
Đáp án đúng là: C
Đáp án cần chọn là: C
According to the first paragraph, counting and describing are associated with
Đáp án đúng là: B
Đáp án cần chọn là: B
Why does the author mention the “mother” and “father” in the first paragraph?
Đáp án đúng là: D
Đáp án cần chọn là: D
The word “squarely” in line 8 could best be replaced by which of the following?
Đáp án đúng là: A
Đáp án cần chọn là: A
Which of the following is NOT given as an example of a qualitative variable?
Đáp án đúng là: B
Đáp án cần chọn là: B
Which of the following statements about descriptive statistics is best supported by the passage?
Đáp án đúng là: A
Đáp án cần chọn là: A
The word “comprehensible” in paragraph 2 is closest meaning to _________.
Đáp án đúng là: D
Đáp án cần chọn là: D
According to the passage, what is the purpose of examining a sample of a population?
Đáp án đúng là: B
Đáp án cần chọn là: B
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