Statistics CBSE Questions & Answers

Statistics

This is Mathematics Class 09 Statistics CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Out of sixteen observations arranged in an ascending order, the 8 \(^{{\rm{th}}}\) and 9 \(^{{\rm{th}}}\) observations are 25 and 27. Then, the median is
  • A
    27
  • B
    25
  • C
    26
    Correct
  • D
    26.5
2
The following observations have been arranged in an an ascending order:18, 20, 25, 26, 30, x, 37, 38, 39, 48. If the median of the data is 35, then the value of x is
  • A
    50
  • B
    45
  • C
    35
  • D
    40
    Correct
3
Mode of a set of observations is the value which
  • A
    is the mean of the middle two observations
  • B
    is the sum of the observations
  • C
    divides the observations into two equal parts
  • D
    occurs most frequently
    Correct
4
The mode of 4, 6, 7, 8, 12, 11, 13, 9, 13, 9, 7, 8, 9 is
  • A
    9
    Correct
  • B
    7
  • C
    6
  • D
    13
5
The given data is 3, 5, 6, 7, 5, 4, 7, 5, 6, x, 8 and 7. Then the value of x for which the mode of the above data will be 7, is
  • A
    8
  • B
    7
    Correct
  • C
    6
  • D
    5
6
A set of data consists of six numbers: 7, 8, 8, 9, 9 and x. The difference between the modes when x = 9 and x = 8 is
  • A
    1
    Correct
  • B
    2
  • C
    3
  • D
    4
7
The numbers 2, 3, 4, 4, 2x + 1, 7, 7, 8 and 9 are written in an ascending order. If the median is 7, then mode of this data is
  • A
    8
  • B
    9
  • C
    7
    Correct
  • D
    4
8
For frequency distribution, mean, median and mode are connected by the relation :
  • A
    Mode = 3 Median + 2 Mean
  • B
    Mode = 2 Median – 3 Mean
  • C
    Mode = 3 Median – 2 Mean
    Correct
  • D
    Mode = 3 Mean – 2 Median
9
Median of the following observations, arranged in an ascending order is 22. If the numbers are 8, 11, 13, 15, x + 1, x + 3, 30, 35, 40, 43. Then, the value of x is
  • A
    19
    Correct
  • B
    18
  • C
    16
  • D
    20
10
For which set of data does the median equal the mode ?
  • A
    3, 3, 4
    Correct
  • B
    3, 3, 4, 5, 6
  • C
    3, 4, 5, 6, 6
  • D
    3, 3, 4, 5
11
A grouped frequency distribution table with classes of equal sizes using 105-120 (120 not included) as one of the class interval is constructed for the following data : The number of classes in the distribution will be
Question 11 figure 1
  • A
    7
  • B
    4
  • C
    5
  • D
    6
    Correct
12
In the given graph, the number of students who scored 60 or more marks is
Question 12 figure 1
  • A
    21
    Correct
  • B
    19
  • C
    22
  • D
    20
13
The graph given below shows the frequency distribution of the age of 22 teachers in a school. The number of teachers whose age is less than 40 years is
Question 13 figure 1
  • A
    17
  • B
    15
    Correct
  • C
    14
  • D
    16
14
For the frequency distribution given above, the adjusted frequency for the class 25-45 is:
Question 14 figure 1
  • A
    3
  • B
    5
  • C
    6
  • D
    2
    Correct
15
The average of three consecutive even integers is 20. Then, the integers are
  • A
    16, 18, 20
  • B
    20, 22, 24
  • C
    14, 16, 18
  • D
    18, 20, 22
    Correct