1.
A histogram is used to display:
A
Categorical data
B
Continuous data
C
Discrete data only
D
Univariate data only
2.
The relative frequency of an event is defined as:
A
Frequency / Total number of trials
B
Total trials / Frequency
C
Frequency × Total trials
D
Frequency - Total trials
3.
Which graph is used to display the cumulative frequency distribution?
A
Ogive
B
Histogram
C
Frequency polygon
D
Bar chart
4.
What is the mean of the data: 5, 10, 15, 20, 25?
5.
Find the weighted mean of scores 4, 6, 8 with weights 1, 2, 3 respectively.
A
6.0
B
6.67
C
7.0
D
7.33
6.
A die is rolled. What is the probability of getting a number greater than 4?
7.
What is the mode of the data: 2, 3, 4, 3, 5, 3, 6?
8.
The average of scores 60, 70, 80, 90, 100 is:
9.
If the mean of 3 numbers is 8 and the numbers are 6, 9, and x, what is x?
10.
In probability, the sum of the probabilities of all possible outcomes is:
A
1
B
0
C
0.5
D
Depends on the number of outcomes
11.
Find the median of: 7, 9, 12, 15, 18.
12.
A bag contains 3 red balls and 2 blue balls. What is the probability of picking a red ball?
13.
A bag contains 3 red balls and 5 blue balls. What is the probability of drawing a red ball?
14.
What is the weighted mean if scores are 4, 6, 8 with weights 1, 2, 3 respectively?
A
6.67
B
7.00
C
6.00
D
7.33
15.
What is the median of the grouped data with cumulative frequencies 5, 12, 25, 35, 40 and total frequency 40?
A
Median lies in the class where cumulative frequency reaches 20
B
Median lies in the first class
C
Median lies in the last class
D
Cannot be determined from cumulative frequencies alone
16.
What is the median of: 3, 5, 7, 9, 11, 13?
17.
The median of an even number of observations is:
A
The average of the two middle values
B
The middle value
C
The most frequent value
D
The sum of all values divided by count
18.
A frequency polygon is drawn by joining the midpoints of the tops of the bars of a:
A
Bar chart
B
Histogram
C
Pie chart
D
Line graph
19.
A student scored 70, 80, 90 in three subjects with weights 1, 2, 3. What is the weighted mean?
A
80
B
83.33
C
86.67
D
90
20.
In a frequency polygon, the points are plotted against:
A
Class midpoints
B
Class boundaries
C
Cumulative frequencies
D
Relative frequencies