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