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 12 of 24
111. The A.M. is greater than mode is equal to ______________?
- A. +vely
- B. Skewness
- C. Negatively
- D. zero
Explanation: When the arithmetic mean exceeds the mode, the distribution is conventionally positively skewed, with a longer tail toward larger values. Negative skewness generally has mean below the mode.
Correct answer: +vely112. In a symmetrical distribution mean, median and mode, _________________?
- A. Positive
- B. Greater
- C. Less than
- D. Coincide
Explanation: In a perfectly symmetrical, unimodal distribution, the centre is the same whether measured by mean, median or mode. Thus the three measures coincide.
Correct answer: Coincide113. If (AB) >(A) (B)/n __________ then A and B are?
- A. Independent
- B. Associated
- C. Dis-associated
- D. None of these
Explanation: The expected frequency under independence is (A)(B)/n. If the observed joint frequency (AB) is greater than this expected value, the attributes are positively associated.
Correct answer: Associated114. (A β C) is a frequency of attributes of order_______________?
- A. 3
- B. (2)
- C. 1
- D. D
Explanation: The joint frequency (A B C) involves three attributes together, so it is a frequency of order 3. Each additional attribute in the joint expression increases the order by one.
Correct answer: 3115. Two attributes are associated if expected frequency is ____________________?
- A. Less than observed
- B. Greater than observed
- C. Equal to observed
- D. None of these
Explanation: When the observed joint frequency exceeds the expected frequency under independence, the attributes show positive association. Equality indicates independence, while a smaller observed frequency indicates negative association.
Correct answer: Less than observed116. Attributes are _______ if they have some relation?
- A. Disassociation
- B. In consistent
- C. Associated
- D. None of these
Explanation: Attributes are called associated when they show a relationship or occur together more or less often than expected under independence. Disassociation means the absence of such a relationship.
Correct answer: Associated117. Richness is not a ________________?
- A. Constant
- B. Discreade
- C. Variable
- D. Continuous
Explanation: Richness describes a qualitative attribute or degree of a quality, rather than a numerical variable in this classification. It is therefore not treated as a variable, although the wording could be clearer.
Correct answer: Variable118. γxy is always equal to_____________?
- A. γyx
- B. -γyx
- C. γx
- D. γo2
Explanation: The coefficient of association is symmetric with respect to the two attributes, so interchanging X and Y does not change it. Hence γxy equals γyx.
Correct answer: γyx119. The table representing two attributes is called________________?
- A. Random table
- B. Contingency table
- C. Dichotomy table
- D. Chi-square table
Explanation: A contingency table classifies observations according to two attributes and displays their joint frequencies. Random and chi-square tables are not standard names for this two-way frequency table.
Correct answer: Contingency table120. The time taken by an athlete to run a 400 mile race in SAF games ________________?
- A. Continuous data
- B. Random
- C. Discrete data
- D. Non of these
Explanation: Time can take fractional values such as 39.6 seconds or 40.25 seconds, so race time is continuous data rather than discrete data.
Correct answer: Continuous data