Moderate Level Worksheet
Very Short Answer Questions (1 Mark Each)
(1) Define primary data with one example. Primary data is information collected
(2) Define secondary data with one example. Secondary data is information collected by
(3) Write the tally marks for the number 9.
(4) What is a bar graph? A bar graph is a visual representation of data using
(5) Write the range of the data: 25, 28, 20, 30.
Correct! Range = 30 - 20 = 10.
Short Answer Questions (2 Marks Each)
Note: Answer each question with complete working and clear explanations.
(1) Write the tally marks for the following numbers: 4, 7, 11, 9.
(2) The number of bicycles sold in 5 months are: 35, 42, 28, 40, 30. Represent this data using tally marks.
(3) The number of times each face appears when a die is thrown 30 times is: 1 – 4 times, 2 – 6 times, 3 – 5 times, 4 – 3 times, 5 – 7 times, 6 – 5 times. Draw a bar graph.
(4) The daily sales (in ₹) of a shopkeeper for a week are: 350, 400, 380, 420, 370, 410, 390. Find the range of the sales. Range = ₹
Perfect! Range of sales = ₹70.
(5) A survey was conducted on the number of TV sets in 10 houses: 0, 1, 2, 1, 0, 1, 3, 2, 1, 0. Make a frequency table with tally marks.
Long Answer Questions (4 Marks Each)
Note: Answer each question with complete working and clear explanations.
(1) The marks obtained by 15 students in a test are: 12, 15, 10, 8, 20, 17, 15, 18, 12, 14, 19, 10, 15, 16, 14. Prepare a frequency table using tally marks.
(2) A company sold 500 fans in January, 450 in February, 600 in March, 550 in April, and 400 in May. Represent this data using a bar graph.
(3) The favourite sports of 30 students are: Cricket – 12, Football – 7, Hockey – 5, Tennis – 6. Represent the data using a pictograph (use a suitable symbol).
(4) Draw a bar graph for the given marks distribution data.
(5) The heights (in cm) of 10 plants are: 25, 30, 35, 20, 40, 38, 36, 32, 28, 29. Find the range and represent the data using a bar graph. Range =
Perfect! Range = 20 cm.
Part B: Objective Questions (1 Mark Each)
Choose the correct answer and write the option (a/b/c/d)
(1) Which of the following is secondary data?
(a) Marks of students collected from school office records
(b) Marks you collected by asking your classmates
(c) Marks you noted from your own test paper
(d) Marks obtained from conducting a test yourself
Correct! School office records are secondary data - collected by others.
(2) The range of 12, 18, 25, 20 is:
(a) 5 (b) 13 (c) 7 (d) 10
Correct! Range = 25 - 12 = 13.
(3) In a bar graph, if the scale on y-axis is 1 unit = 5 students, and a bar reaches 4 units high, how many students does it represent?
(a) 4 (b) 9 (c) 20 (d) 25
Correct! If 1 unit = 5 students, then 4 units = 4 × 5 = 20 students.
(4) In a bar graph, the bars can be:
(a) Only vertical (b) Only horizontal (c) Either vertical or horizontal (d) Diagonal
Correct! Bar graphs can have either vertical or horizontal bars.
(5) The sum of frequencies of all categories in a data set is called:
(a) Range (b) Total frequency (c) Tally (d) Mean
Correct! Total frequency is the sum of all individual frequencies.
(6) Which of these is NOT a method of data representation?
(a) Bar graph (b) Pictograph (c) Tally marks (d) Subtraction
Correct! Subtraction is a mathematical operation, not a data representation method.
(7) In a pictograph, if 1 picture represents 5 books, then 4 pictures represent:
(a) 10 books (b) 15 books (c) 20 books (d) 25 books
Correct! 4 pictures × 5 books per picture = 20 books.
(8) A bar graph shows that the tallest bar corresponds to:
(a) The highest frequency (b) The lowest frequency (c) The range (d) The average
Correct! The tallest bar represents the category with the highest frequency.
(9) What is the median of the data set: 12, 8, 15, 10, 6, 20, 9?
(a) 9 (b) 10 (c) 12 (d) 15
Correct! First arrange in order: 6, 8, 9, 10, 12, 15, 20. The median is the middle value = 10.
(10) The range of 25, 30, 22, 28 is:
(a) 8 (b) 5 (c) 6 (d) 7
Correct! Range = 30 - 22 = 8.
Advanced Data Concepts True or False
Determine whether these statements are True or False: