X Statics mean median mode and Ogive MCQ

X Statics mean median mode and Ogive

MULTIPLE CHOICE QUESTIONS

1. If 35 is the upper limit of the class-interval of class-size 10, then the lower limit of the class-interval is :

(a) 20                                                               (b) 25

(c) 30                                                               (d) none of these

2. In the assumed mean method, if A is the assumed mean, than deviation di is :

(a) xi + A                                                        (b) xi – A

(c) A – xi                                                        (d) none of these]

3. Mode is:

(a) Middle most value (b) least frequent value (c) most frequent value (d) none of these

4. While computing mean of grouped data, we assume that the frequencies are :

(a) evenly distributed over all the classes       (b) centred at the class-marks of the classes

(c) centred at the upper limits of the classes   (d) centred at the lower limits of the classes

5. The curve drawn by taking upper limits along x-axis and cumulative frequency along y-axis is :

(a) frequency polygon                                      (b) more than ogive

(c) less than ogive                                           (d) none of these

6. For ‘more than ogive’ the x-axis represents :

(a) upper limits of class-intervals                    (b) mid-values of class-intervals

(c) lower limits of class-intervals                    (d) frequency

7. Ogive is the graph of :

(a) lower limits and frequency                        (b) upper limits and frequency

(c)lower/upper limits and cumulative frequency (d) none of these

8. The curve ‘less than ogive’ is always :

(a)ascending                                                    (b) descending

(c) sometimes ascending and sometimes descending (d) none of these

9. If mode = 80 and mean = 110, then the median is

(a)110                                                              (b)120

(c)100                                                              (d)90

10. The mean of the following data is : 45, 35, 20, 30, 15, 25, 40 :

(a) 15                                                               (b) 25

(c) 35                                                               (d) 30

11 . The mean and median of a data are 14 and 15 respectively. The value of mode is  (a) 16                                                                           (b) 17

(c) 13                                                               (d) 18

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 :

(a) 4.5                                                              (b) 20

(c) 50                                                               (d) 15.5

13. Which of the following is not a measure of central tendency ?

(a) Mean                                                          (b) Median

(c) Range                                                         (d) Mode

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 :

(a)mean                                                           (b) median

(c) mode                                                         (d) all the three above

15. The measures of central tendency which can’t be found graphically is

(a) mean                                                          (b) median

(c) mode                                                          (d) none of these