Test Series-14


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1.The median of the data 10 14 12 16 20 18

2) The range of the data 2, 23,33 ,99,43,45,65,78
   None of these

3. The mode of the data 12,16,19,16,19,16,17,15
   None of these

4. Let a be the midpoint and b the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is:?

   2b -a
    2a -b
    a - b
    a + b

5. class mark of the class interval 1.2-1.4 is
   None of these

6.The mean of 10 numbers is 15. If each number if multiplied by 3, what will be the new mean?
   None of these

7. The following observations have been arranged in ascending order as 29, 32, 48, 50, x, x + 2, 72,78, 84, 95. If the median of the data is 61, find the value of x.?

8. Continuous Frequency Distribution is ?
    is the diagram showing a system of connections or interrelations between two or more things by using bars
   A frequency distribution in which the upper limit of one class coincides from the lower limit of the succeeding class
   A frequency distribution in which the upper limit of one class differs from the lower limit of the succeeding class .
   none of these

9. If xm represents the mean of n observations x1, x2, x3, .xn, then the value of ∑(xi-xm)?

10.For drawing a frequency polygon of a continuous frequency distribution, we plot the points whose ordinates are the frequency of the respective classes and abscissa re respectively
    upper limits of the classes
    upper limits of preceding classes
    lower limits of the classes
    class marks of the classes

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