Chapter 8: Descriptive Statistics and ProbabilityMarch 13, 2024 Maven Leave a Comment Welcome to the Chapter 8: Descriptive Statistics and Probability Name Email 1. If median = 45 and its coefficient is 0.25, then the mean deviation about median is 11.25 180 0.0056 45 None 2. 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 3. If Q1 = 30 and Q3 = 50, the coefficient of quartile deviation is 20 40 10 25 None 4. If the mean of 1,2,3, …, n is $\frac{6n}{11}$, then the value of n is 10 12 11 13 None 5. The first quartile is also known as median lower quartile mode. third decile None 6. The mean of the values 11,12,13,14 and 15 is 15 11 12.5 13 None 7. 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 8. 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 9. 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 10. 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 11. 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 12. 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 13. Probability of an impossible event is 1 0 0.2 0.5 None 14. 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 15. If the outcome of one event does not influence another event then the two events are Mutually exclusive Dependent Not disjoint Independent None 16. The harmonic mean of the numbers 2,3,4 is $\frac{12}{13}$ 12 $\frac{36}{13}$ $\frac{13}{36}$ None 17. The best measure of central tendency is Arithmetic mean Harmonic mean Geometric mean Median None 18. 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 19. 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 20. When an observation in the data is zero, then its geometric mean is Negative Positive Zero Cannot be calculated None 21. The median of 10,14,11,9,8,12,6 is 10 12 14 9 None 22. The geometric mean of two numbers 8 and 18 shall be 12 13 15 11.08 None 23. Which of the following is positional measure? Range Mode Mean deviation Percentiles None 24. Median is same as $Q_{1}$ $Q_{2}$ $Q_{3}$ $D_{2}$ None 25. When calculating the average growth of economy, the correct mean to use is? Weighted mean Arithmetic mean Geometric mean Harmonic mean None Time's upRelated Posts:Chapter 4: Cost and Revenue AnalysisChapter 5: Market Structure and PricingChapter 8: Indian Economy Before and After IndependenceChapter 3: Theories of Employment and Income
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