X Statics mean median mode and Ogive
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MULTIPLE CHOICE QUESTIONS
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1. If 35 is the upper limit of the class-interval of class-size 10, then the lower limit of the class-interval is :
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(a) 20 (b) 25
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(c) 30 (d) none of these
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2. In the assumed mean method, if A is the assumed mean, than deviation di is :
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(a) xi + A (b) xi – A
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(c) A – xi (d) none of these]
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3. Mode is:
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(a) Middle most value (b) least frequent value (c) most frequent value (d) none of these
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4. While computing mean of grouped data, we assume that the frequencies are :
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(a) evenly distributed over all the classes (b) centred at the class-marks of the classes
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(c) centred at the upper limits of the classes (d) centred at the lower limits of the classes
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5. The curve drawn by taking upper limits along x-axis and cumulative frequency along y-axis is :
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(a) frequency polygon (b) more than ogive
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(c) less than ogive (d) none of these
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6. For ‘more than ogive’ the x-axis represents :
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(a) upper limits of class-intervals (b) mid-values of class-intervals
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(c) lower limits of class-intervals (d) frequency
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7. Ogive is the graph of :
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(a) lower limits and frequency (b) upper limits and frequency
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(c)lower/upper limits and cumulative frequency (d) none of these
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8. The curve ‘less than ogive’ is always :
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(a)ascending (b) descending
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(c) sometimes ascending and sometimes descending (d) none of these
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9. If mode = 80 and mean = 110, then the median is
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(a)110 (b)120
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(c)100 (d)90
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10. The mean of the following data is : 45, 35, 20, 30, 15, 25, 40 :
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(a) 15 (b) 25
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(c) 35 (d) 30
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11 . The mean and median of a data are 14 and 15 respectively. The value of mode is (a) 16 (b) 17
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(c) 13 (d) 18
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12 . For a given data with 50 observations the ‘less than ogive’ and the ‘more then ogive’ intersect at (15.5, 20). The median of the data is :
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(a) 4.5 (b) 20
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(c) 50 (d) 15.5
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13. Which of the following is not a measure of central tendency ?
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(a) Mean (b) Median
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(c) Range (d) Mode
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14. The abscissa of the point of intersection of the less than type and of the more than type cumulative frequency curves of a grouped data gives its :
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(a)mean (b) median
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(c) mode (d) all the three above
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15. The measures of central tendency which can’t be found graphically is
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(a) mean (b) median
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(c) mode (d) none of these
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