Data Handling
ICSE · Class 8 · Mathematics
Flashcards for Data Handling — ICSE Class 8 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
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A set of data is 5, 7, 3, 8, 7, 5, 5, 3, 5, 8, 7. What is the frequency of 5?
Answer
Step 1: Count how many times 5 appears. Step 2: The number 5 appears 4 times. Answer: Frequency of 5 = 4.
In the data set 5, 7, 3, 8, 7, 5, 5, 3, 5, 8, 7, what are the frequencies of 3 and 8?
Answer
Step 1: Count 3s in the data. Step 2: Count 8s in the data. Step 3: 3 appears 2 times and 8 appears 2 times. Answer: Frequency of 3 = 2 and frequency of 8 = 2.
What is the frequency table for the marks 4, 5, 6, 7, 8, 9, 10 with frequencies 3, 5, 7, 2, 6, 3, 4?
Answer
Step 1: Write each mark with its frequency. Step 2: Pair them in order. Marks: 4, 5, 6, 7, 8, 9, 10 Frequencies: 3, 5, 7, 2, 6, 3, 4 Answer: The frequency table is the table of these paired values.
Classify this table: marks are written without class intervals, only each value and its frequency are shown. What type of frequency distribution is it?
Answer
Step 1: Check whether class intervals are used. Step 2: No class intervals are used. Step 3: Each separate value has its own frequency. Answer: It is an ungrouped frequency distribution.
The temperatures 11.3°C, 11.4°C, 11.5°C, 11.6°C, 11.7°C, and 11.8°C have frequencies 7, 5, 6, 4, 5, and 3. What is the frequency of 11.5°C?
Answer
Step 1: Find the temperature 11.5°C. Step 2: Read its frequency. Step 3: The frequency is 6. Answer: Frequency of 11.5°C = 6.
How are tally marks made when the fifth count comes?
Answer
Step 1: Make four short vertical strokes first. Step 2: Draw the fifth stroke across those four strokes. Step 3: This forms one bundle of five. Answer: The fifth stroke is drawn across the first four …
Arrange the raw data 9, 8, 6, 10, 5, 6, 8, 7, 10, 5, 6, 4, 5, 7, 8, 10, 8, 9, 6, 5, 4, 8, 8, 9, 10, 6, 6, 6, 5, 4 into ascending order.
Answer
Step 1: Start from the smallest number. Step 2: Group equal numbers together. Step 3: The array is 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10. Answer: Th…
The raw marks of 30 students are given. How many students scored 8?
Answer
Step 1: Look for 8 in the frequency table. Step 2: The frequency of 8 is 6. Answer: 6 students scored 8.
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