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Choose the correct alternative out of four alternativ, EXERCISE, 1A : Multiple Choice Questions, Choose the correct alternative out of four alternati, below for each question., 1. Mean of first n natural numbers is....., (n + 1), (a), n(n + 1), (b), (n + 1)², (c), 2, 2., 2, (d) none, 2. Algebraic sum of the deviations taken from the respec, is....., (a) 0, (b) 1, (c) 2, (d) non, Scanned by CamScanner

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E.Y.B.Sc. Descriptive Statistics - I (P-I), 1.45, Nature of Data & Measures of C. T., Which of the following is positional average?, (b) G.M., (а) А.М., (с) Н.М., (d) Median, Which measure of central tendency is least affected hy the extreme, values?, (а) А.М., (b) Median, (c) G.M., (d) H.M., 5. The mean age of a group of 10 students is 20 years today. What was, their mean age in the month before ten years?, (a) 240, (b) 120, (c) 100, (d) 130, 6. The mean of 10 observations is 82. If two observations 82 and 92 are, changed to 72 and 82 respectively, the changed value of the mean, is..., (c) 80, 7. Median of 25 observations is 51. By including 6 more observations, 49, 21, 63, 57, 39 and 61 the median will be.. ., (а) 82, (b) 92, (d) none of these, (a) more than 51, (b) less than 51, (c) 25, (d) none of these, 8. The average of the marks obtained in an examination by 8 students, was 51 and by another 9 students was 68. The average marks of, these total 17 students was.........., (a) 59, (b) 59.5, (c) 60, (d) 60.5, A shoes manufacturer wishes to manufacture only the most popular, size shoes. Which measure of central tendency for the shoes can help, the manufacturer in arriving at the desired size?, (а) А.М., (b) median, (c) mode, (d) Н.М., 10. Second Quartile is equal to......, (а) А.М., (b) median, (c) mode, (d) none of these, J1. Third Quartile is equal to...., (a) A.M., (d) 75th percentile, (c) mode, GFor a set of 10 positive observations on a variable X, A.M., G.M., and H.M. are computed, then which of the following triplet (A.M.,, is appropriate., (b) median, G.M., H.M.), (a) (50, 45, 40), (b) (40, 50, 45), (c) (40, 45, 50), (d) (45, 40, 50), Scanned by CamScanner

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13. In a class, the average age of 50 boys is 16 years and 6 months a, 16. The marks obtained in a test are 0, 1, 5, 6, 9, 9, 13, 12, 15, 17, 20,, * 15. When finding the third Quartile from greater than ogive curve the Y, Nature of Bata & Measures of C.t., F.Y.B.Sc. Descriptive Statistics-I (P-1)., 1.46, a, and, years, that of girls is 15 years. The average age of whole class is 15, and 6 months. The number of girls in the class is given by...., (d) 150, (а) 75, (b) 82, (c) 100, * 14. Second Quartile divides the series in the ratio....., (d) 2:1, (a) 1:1, (b) 1:4, (c) 1: 2, co-ordinate of the point greater than ogive curve is....., (d) 3N/2, (a) N/4, (b) N/2, (c) 3N/4, 25, 25 and 26. The teacher computes all of the descriptive measuree, of central tendency then he observed that an error was made and one, of the 25's is actually 30. Which of the following average will notbhe, changed?, (а) А.М., (b) Median, (c) Mode, (d) H.M., 17. The most favourable colour of 10 individuals are recorded. For this, data we can compute......., (а) А.М., (b) Median, (c) Mode, (d) none of these, 18. Second decile divides the series in the ratio......, (a) 2: 10, (b) 2:8, (c) 1: 10, (d) 2:1, 19. If each observation of a set is divided by 2 then. the first Quartile of, new values......, (a) is two times the original value, (b) is decreased by 2, (c) remains the same, (d) is half that of the original value, 20. If a constant value 50 is subtracted from each observation of a sek, the mean of the set is..., (a) increased by 50, (b) decreased by 50, (c) not affected, (d) 50 times the original value, Scanned by CamScanner

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F.Y.B.Sc. Descriptlve Statistlcs – 1 (P.1), 21. A distribution of 6 scores has median of 21. If the highest score, increases by 3 points, the median will become..., 1,47, Nature of Data & Measures of C. T., ........, (a) 21, (b) 21.5, (с) 24, (d) cannot determined without additional information, 22. Which of the following statement is always correct?, 7 (a) A.M. = G.M. = H.M., (b) A.M. > G.M. > H.M., %3D, %3D, (c) G.M. > A.M. > H.M., (d) H.M. > G.M. > A.M., 23. The value of 2 (x, - k)/n is...., fa zero if k = mean, (b) always zero, (c) n - 1, (d) none of these, 24. Let X be a random variable with mean (X). Define U = (X - A)/h,, where A and h are any constants and h + 0 then with usual, notations......, (a) x = A, (b) x = A+ hū, (c) = hū, (d) x = Au +h, 25. Out of 1000 observations 250 observations are less than 35 and 250, observations are more than 75, then the inter-quartile range is equal, to, ..... ......, (a) 40, (b) 0, (c) 500, (d) 750, 26. Let X1, X2, X, be a speed of a train per unit time for T1, T2, T3, duration of time respectively then we can compute average speed of, train, per, unit time by using., ............, (а) А.М., (b) Н.М., (c) G.M., (d) Median -, 27. If 50 is added to 80% of the observations and 50 is subtracted from, the other observations mean will... ., .... ..., (a) Increased by 8, (b) Increased by 3, (c) Not changed, (d) None of these., Scanned by CamScanner

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* 30. Which of the following relation among the location parameter does, Nature of Data & Measures of C.T., 128 Group of individuals according to income such as Poor, Middle o, per hour. Then average speed of train in these two kilometer journey, 29. A train while leaving the terminus travels first kilometer distance a, a speed of 10 km per hour. For the next kilometer the speed is 15 km, F.Y.B.Sc. Descriptive Statistics-I (P-I), 1.48, class, and Rich is an example of..., (a) Nominal Scale, (b) Ordinal Scale, (c) Interval Scale, (d) Ratio Scale, at, is...., (а) 12, (b) 12.5, (c) 13, (d) 13.5, not hold?, (a) Q2 = median, (b) P50 = median, (c) D5 = median, (d) D6 = median, 31. Which measure of central tendency is most affected by extreme, values?, (a) A.M., (b) Median, (c) Qi, (d) Q3, 32, Compare mean and median for the data 5, 15, 20, 25, 30 have, relation...., (a) Mean < Median, (b) Mean > median, (c) Mean = Median, d) None of these above, * 33. If the grouped data has open-end classes one cannot calculate.., (a) Median, (b) Mode, (c) Mean, 34. G.M of the two numbers 1/16 and 4/25 is......, (d) Quartile, (a) TO, 1, (b) 100, (c) 10, 10, (d) 100, 35. If the A.M of a two observations is 6.5 and the G.M is 6 the two, numbers are......., (a) 9, 6, (b) 9, 5, (c) 7,6, (d) 4, 9., * 36. What percentage of value is less than Q3?, .(a) 30%, (b) 70%, (c) 40%, (d) none of these, Scanned by CamScanner