Worksheets › Class 8 › Tales by Dots and Lines
Class 8 Tales by Dots and Lines worksheet
CBSE Mathematics. Frequency tables, grouped data, mean, median and mode, line graphs, percentages, comparing groups. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
Value 4 appears 1 times, 11 appears 2 times and 17 appears 2 times. The mean is:
- 13
- 10.67
- 12
- 5
Answer
(c) 12
4 × 1 + 11 × 2 + 17 × 2 = 60; ÷ 5
- 2.
Data is grouped in classes of width 5 (0–5, 5–10, …). Which class does 88 go in?
- 85–90
- 80–85
- 90–95
- 88–93
Answer
(a) 85–90
85 ≤ 88 < 90
- 3.
In a frequency table, the frequency of a value is:
- how many times it appears
- the largest value
- the mean
- the value itself
Answer
(a) how many times it appears
Section B · short answer
- 4.
Make a grouped frequency table (0–10, 10–20, …, 40–50) for these 20 scores: 30, 14, 7, 40, 44, 29, 43, 30, 45, 34, 16, 35, 25, 42, 19, 35, 41, 32, 44, 30.
Answer
0–10: 1, 10–20: 3, 20–30: 2, 30–40: 7, 40–50: 7
the frequencies add up to 20
- 5.
Find the mean: 8 occurs 7 times; 14 occurs 7 times; 15 occurs 3 times; 27 occurs 9 times.
Answer
17
442 ÷ 26
Section C · long answer
- 6.
A line graph shows monthly rainfall in mm: June 319, July 383, August 133, September 53. Which month was wettest? What was the total rainfall, and the change from June to September?
Answer
July; 888 mm; a fall of 266 mm
319 + 383 + 133 + 53 = 888
Fresh sheets for your child
In the app, every Tales by Dots and Lines sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.