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Statistics

ICSE · Class 9 · Mathematics

Flashcards for Statistics — ICSE Class 9 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.

41 questions30 flashcards5 concepts

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An illustration comparing raw (ungrouped) data, arrayed data (sorted), and tabulated data (organized in a basic table with categories and totals).
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30 Flashcards
Card 1Data

A class test has these marks: Ashok 2, Meeta 7, Beena 8, Hemant 6, Shivani 9. Write the set of data.

Answer

Step 1: List the marks in the order given. Step 2: The data is 2, 7, 8, 6, 9. Answer: The set of data is 2, 7, 8, 6, 9.

Card 2Arrayed Data

Arrange the data 08, 15, 23, 16, 46, 32, 42, 37, 28, 19, 45, 33, 22, 11, 20, 40, 50, 39, 34, 49 in ascending order.

Answer

Step 1: Write the smallest number first. Step 2: Compare all values and arrange from low to high. Step 3: Ascending order is 08, 11, 15, 16, 19, 20, 22, 23, 28, 32, 33, 34, 37, 39, 40, 42, 45, 46, 49,…

Card 3Variables

Which type of variable is the number of children in a family?

Answer

Step 1: A variable that cannot take all numerical values is discrete. Step 2: Number of children cannot be 2.5 or 3.7. Answer: Number of children in a family is a discrete variable.

Card 4Variables

Which type of variable is the height of children?

Answer

Step 1: Height can take any value within a range. Step 2: It may be 120 cm, 120.5 cm, or 120.75 cm. Answer: Height of children is a continuous variable.

Card 5Frequency

A set of data has values 1, 2, 0, 3, 2, 1, 5, 4, 3, 2, 1, 2. Find the frequency of 2.

Answer

Step 1: Count how many times 2 appears. Step 2: 2 appears 4 times. Answer: Frequency of 2 is 4.

Card 6Ungrouped Frequency Distribution

Make a frequency table for shoe sizes 4, 3, 5, 6, 5, 6, 5, 6, 3, 6, 3, 3, 6, 4, 6, 6, 6, 4, 5.

Answer

Step 1: List sizes in order: 3, 4, 5, 6. Step 2: Count each size. Step 3: 3 occurs 4 times, 4 occurs 3 times, 5 occurs 4 times, 6 occurs 8 times. Answer: Frequency table: 3 → 4, 4 → 3, 5 → 4, 6 → 8.

Card 7Frequency Distribution Types

Classify the frequency distribution with class intervals 1-10, 11-20, 21-30, 31-40.

Answer

Step 1: Check the boundary rule. Step 2: The upper limit of one class does not coincide with the lower limit of the next class. Answer: It is an inclusive distribution.

Card 8Frequency Distribution Types

Classify the frequency distribution with class intervals 10-20, 20-30, 30-40, 40-50.

Answer

Step 1: Check the boundary rule. Step 2: The upper limit of one class coincides with the lower limit of the next class. Answer: It is an exclusive distribution.

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Frequently Asked Questions

What are the important topics in Statistics for ICSE Class 9 Mathematics?
Statistics covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Statistics — ICSE Class 9 Mathematics?
Understand the core concepts first, then work through the 41 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many flashcards are available for Statistics?
There are 30 flashcards for Statistics covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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