Chapter 8: Descriptive Statistics and ProbabilityMarch 13, 2024 Maven Leave a Comment Welcome to the Chapter 8: Descriptive Statistics and Probability Quiz! Name Email 1. The geometric mean of two numbers 8 and 18 shall be 12 13 15 11.08 None 2. The harmonic mean of the numbers 2,3,4 is $\frac{12}{13}$ 12 $\frac{36}{13}$ $\frac{13}{36}$ None 3. When an observation in the data is zero, then its geometric mean is Negative Positive Zero Cannot be calculated None 4. The best measure of central tendency is Arithmetic mean Harmonic mean Geometric mean Median None 5. Which of the following is positional measure? Range Mode Mean deviation Percentiles None 6. When calculating the average growth of economy, the correct mean to use is? Weighted mean Arithmetic mean Geometric mean Harmonic mean None 7. The median of 10,14,11,9,8,12,6 is 10 12 14 9 None 8. The correct relationship among A.M.,G.M.and H.M.is A.M. G.M.≥A.M.≥H.M. H.M.≥G.M.≥A.M. A.M.≥G.M.≥H.M. None 9. Median is same as $Q_{1}$ $Q_{2}$ $Q_{3}$ $D_{2}$ None 10. Harmonic mean is the reciprocal of Median of the values. Geometric mean of the values. Arithmetic mean of the reciprocal of the values. Quartiles of the values. None 11. If the mean of 1,2,3, …, n is $\frac{6n}{11}$, then the value of n is 10 12 11 13 None 12. If two events A and B are dependent then the conditional probability of P(B/A) is P(A) P(B/A) $\frac{P(A\cap B)}{P(B)}$ $ \frac{P(A\cap B)}{P(A)}$ P(A) P(A/B) None 13. If median = 45 and its coefficient is 0.25, then the mean deviation about median is 11.25 180 0.0056 45 None 14. If Q1 = 30 and Q3 = 50, the coefficient of quartile deviation is 20 40 10 25 None 15. The two events A and B are mutually exclusive if P $(A\cap B)$ =0 P $(A\cap B)$ =1 P $(A\cup B)$ =0 P $(A\cup B)$ =1 None 16. The mean of the values 11,12,13,14 and 15 is 15 11 12.5 13 None 17. The probability of drawing a spade from a pack of card is $\frac{1}{52}$ $\frac{1}{13}$ $\frac{4}{13}$ $\frac{1}{4}$ None 18. The events A and B are independent if P$(A\cap B)$ =0 P$(A\cap B)$ = P (A) x P (B) P$(A\cap B)$ = P (A) + P (B) P$(A\cup B)$ = P (A) x P (B) None 19. Harmonic mean is better than other means if the data are for Speed or rates Heights or lengths. Binary values like 0 and 1. Ratios or proportions. None 20. The first quartile is also known as median lower quartile mode. third decile None 21. Probability of an impossible event is 1 0 0.2 0.5 None 22. Let a sample space of an experiment be S=$\left \{ E_{1}, E_{2}...E_{n} \right \}$, then $\sum_{i=1}^{n} P\left ( E_{1} \right )$ is equal to 0 1 $\frac{1}{2}$ $\frac{1}{3}$ None 23. Probability that at least one of the events A, B occur is $P(A\cup B)$ $P(A\cap B)$ P(A/B) $(A\cup B)$ None 24. If the outcome of one event does not influence another event then the two events are Mutually exclusive Dependent Not disjoint Independent None 25. The probability of obtaining an even prime number on each die, when a pair of dice is rolled is $\frac{1}{36}$ 0 $\frac{1}{3}$ $\frac{1}{6}$ None Time's upRelated Posts:Chapter 13 : Concept Of Market and MarketerChapter 14 : Marketing and Marketing MixChapter 20 : Liberalization, Privatization and GlobalizationChapter 6: Retirement and death of a partner
Leave a Reply