Free Descriptive Statistics MCQs with Answers
238 Descriptive Statistics MCQs from Statistics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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21. Any data collected by the investigator personally from the informants are called __________ data?
- A. Primary
- B. Unofficial
- C. Group data
- D. None of these
Explanation: Primary data are collected firsthand by the investigator directly from respondents or informants. Data obtained from reports or other existing sources are secondary data.
Correct answer: Primary22. The difference between the upper and lower class boundaries of a class are know as _________________?
- A. Class interval
- B. class mark
- C. class frequency
- D. Mid point
Explanation: The class interval is the width of a class, found by subtracting its lower boundary from its upper boundary. A class mark is instead the midpoint of the class.
Correct answer: Class interval23. _______are used to represent data classified on qualitative?
- A. Vertical bars
- B. Simple bar
- C. Horizontal bars
- D. Pie chart
Explanation: Horizontal bars are useful for qualitative categories, especially when category names are long, because the labels remain easy to read. Pie charts and other bar orientations can also display qualitative data, but horizontal bars are the intended choice here.
Correct answer: Horizontal bars24. The headings for various columns are said to be ________________?
- A. Portions of column
- B. Vertical column
- C. Column table
- D. Column caption
Explanation: The heading identifying the contents of a column is called its column caption. It tells the reader what variable or measurement that column contains.
Correct answer: Column caption25. Frequency table is an arrangement of data by classes together with their _______ class frequencies?
- A. Terms
- B. Alternate class
- C. Same class
- D. Corresponding class
Explanation: A frequency table pairs each class with the frequency belonging to that class. Therefore, the frequencies are called corresponding class frequencies.
Correct answer: Corresponding class26. Data which have not been arranged in systematic order is called___________?
- A. Group data
- B. Tabular data
- C. Raw data
- D. Undefined data
Explanation: Raw data are observations collected in their original form before sorting, grouping, or tabulation. Grouped and tabular data have already been systematically organized.
Correct answer: Raw data27. Range is the difference between largest and ___________?
- A. Lowest
- B. Smallest
- C. Biggest
- D. Middlest
Explanation: Range measures spread by subtracting the smallest observation from the largest observation: Range = largest value − smallest value. “Lowest” also has the same meaning, but “smallest” is the standard statistical term used here.
Correct answer: Smallest28. Cumulative frequency is the frequency _________ than the upper class boundary of a class?
- A. Distribution
- B. Curve
- C. Greater
- D. Less
Explanation: In a less-than cumulative frequency, frequencies are added for observations below the upper class boundary. Thus the cumulative frequency is less than the upper boundary value in the stated formulation.
Correct answer: Less29. if we connect the mid point of rectangles in a histogram with a series of lines, we get __________
- A. Mid point
- B. Interval
- C. Frequency curve
- D. Frequency Polygon
Explanation: Joining the midpoints of the tops of histogram rectangles produces a frequency polygon. A frequency curve is obtained when the polygon is smoothed rather than left as connected straight segments.
Correct answer: Frequency Polygon30. The smallest and the largest value of any given class of a frequency distribution are called ___________?
- A. Class marks
- B. Class interval
- C. Mid point
- D. Class limit
Explanation: The lower and upper values that define the ends of a class are its class limits. The class mark or midpoint is instead the value halfway between those limits.
Correct answer: Class limit