All Free Statistics MCQs with Answers
Every Statistics question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
545 questions · page 5 of 55
41. When in a frequency distribution the maximum frequency occur at one end, then the frequency curve of such distribution is ________________?
- A. J- shaped
- B. U- shaped
- C. Bell- shaped
- D. V- shaped
Explanation: When frequencies rise toward one end of the distribution, the plotted curve has a J shape, or a reverse-J shape depending on the direction. A U shape has high frequencies at both ends, not just one.
Correct answer: J- shaped42. The graph obtained by joining the mid points of the tops of adjacent rectangles in histogram is called ______________?
- A. Frequency polgon
- B. Ogive
- C. Pie chart
- D. Histgram
Explanation: Joining the midpoints of the tops of adjacent histogram rectangles produces a frequency polygon. An ogive instead joins cumulative frequencies, so it is not the correct graph here.
Correct answer: Frequency polgon43. Class mark is the value which divides a class into ________ equal parts?
- A. Four
- B. One
- C. Three
- D. Two
Explanation: The class mark is the midpoint, calculated as (lower limit + upper limit) ÷ 2. It therefore divides a class interval into two equal parts.
Correct answer: Two44. 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: Primary45. 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 interval46. _______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 bars47. 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 caption48. 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 class49. 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 data50. 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: Smallest