Test Series-19

### Instructions

• Your test contains 10 multiple choice questions with only one answer
• This is 30 min test.Please make sure you complete it in stipulated time
• You can Finish this test any time using 'Submit' button.
• Once finished you get a chance to review all question with correct answers and their solutions.

1.In a frequency distribution mode is 7.88, mean is 8.32 find the median.?
7.2
8.17
8.1
cannot be determined

2) The mean of 20 numbers is 31, what will be the new mean, if each observation is increased by 4?
35
33
34
None of these

3.What measure of central tendency is represented by the abscissa of the point where less than ogive and more than ogive intersect?

mean
mode
median
None of these

4. The mean of the frequency distribution. ?
 class-interval 50-60 60-70 70-80 80-90 90-100 Frequency 8 6 12 11 13

76
78
80
None of these

5. The modal class of the grouped size frequency table given below is
 class-interval 50-60 60-70 70-80 80-90 90-100 100-110 Frequency 18 62 12 11 13 13

60-70
50-60
80-90
None of these

6. For ‘more than ogive’ the x-axis represents :
upper limits of class-intervals
frequency
lower limits of class intervals
mid-values of class-intervals

7.Find the value of k if the median of the following frequency distribution is 50 ?
 class-interval 20-30 30-40 40-50 50-60 60-70 70-80 80-90 Frequency 25 15 k 6 24 12 8

10
20
15
None of these

8.Which of these is not a measure of centeral tendency of the frequncy distribution
mean
mode
median
range

9.The mean of 25 observations is 36. Out of these observations if the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is ?
24
35
34
36

10.The class marks of the frequency distribution is 15,20,25,30......45. What is the class interval for class mark 45?
40-50
42.5-47.5
42-48
none of these

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