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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238 questions · page 22 of 24
211. Marital status of an individual is the example of___________?
- A. Attribute
- B. Discrete variable
- C. Continuous variable
- D. Constant
Explanation: Marital status is an attribute because it describes a qualitative characteristic such as single, married, or widowed. It is not numerical, so it is neither discrete nor continuous.
Correct answer: Attribute212. The middle value of an ordered array of numbers is the____________?
- A. Mode
- B. Mean
- C. Median
- D. Mid Point
Explanation: The median is the central value after the observations are arranged in order. If there are two central values, their arithmetic mean is the median.
Correct answer: Median213. Which of the following divides a group of data into four subgroups?
- A. Percentiles
- B. Deciles
- C. Median
- D. Quartiles
- E. Standard Deviation
Explanation: Quartiles divide ordered data into four equal parts, producing Q1, Q2, and Q3 as the dividing points. Percentiles and deciles divide data into 100 and 10 parts respectively.
Correct answer: Quartiles214. The weights of students in a college/school is a___________?
- A. Discrete Variable
- B. Continuous Variable
- C. Qualitative Variable
- D. None of these
Explanation: Weight is measured on a continuous scale because it can take fractional values such as 52.4 kg or 52.45 kg. A discrete variable is obtained by counting whole units.
Correct answer: Continuous Variable215. The number of accidents in a city during 2012 is____________?
- A. Discrete variable
- B. Continuous variable
- C. Qualitative variable
- D. Constant
Explanation: The number of accidents is a count and can take only whole-number values such as 0, 1, or 2. Counts are therefore discrete variables, unlike measurements such as weight or time.
Correct answer: Discrete variable216. The data which have already been collected by some one are called____________?
- A. Raw data
- B. Array data
- C. Secondary data
- D. Fictitious data
Explanation: Secondary data are data previously collected by another person or organization for a different or broader purpose. Data collected firsthand by the researcher are called primary data.
Correct answer: Secondary data217. A parameter is a measure which is computed from___________?
- A. Population data
- B. Sample data
- C. Test statistics
- D. None of these
Explanation: A parameter describes a population, so it is computed using population data. A value calculated from sample data is called a statistic, not a parameter.
Correct answer: Population data218. Questionnaire survey method is used to collect____________?
- A. Secondary data
- B. Qualitative variable
- C. Primary data
- D. None of these
Explanation: A questionnaire gathers information directly from respondents, making it a method of collecting primary data. Secondary data already exists in sources such as reports, records, or databases.
Correct answer: Primary data219. In a distribution of 10, 20, 30, 40, 50, the x is 30, the sum of deviations from x will be:________?
- A. 60
- B. 30
- C. Zero
- D. 15
Explanation: Taking deviations from 30 gives -20, -10, 0, 10, and 20, whose positive and negative values cancel. Therefore, their sum is zero.
Correct answer: Zero220. Which of the measures given here are based on every item of the series (uses all observations)?
- A. Range
- B. Standard Deviation
- C. Quartile Deviation
- D. All of them
Explanation: Standard deviation uses every observation through the squared deviations from the mean. Range uses only the smallest and largest values, while quartile deviation depends mainly on the quartiles.
Correct answer: Standard Deviation