Statistics
ICSE · Class 9 · Mathematics
Flashcards for Statistics — ICSE Class 9 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
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Explore the full setWhat is Statistics? Give both singular and plural meanings.
Answer
Singular: Statistics is a branch of mathematics that deals with statistical principles and methods used in collecting, analyzing, and interpreting data. Plural: Statistics refers to numerical data co…
Define a Variable and give examples.
Answer
A variable is a quantity that can vary from one individual to another. Examples: height, weight, age, marks of students, number of children in a family, daily temperature, rainfall records.
What is the difference between Continuous and Discrete variables? Give examples of each.
Answer
Continuous Variable: Can take any numerical value within a certain range. Examples: wages, heights, rainfall, time, temperature Discrete Variable: Cannot take all possible numerical values between tw…
What is the difference between Raw Data and Arrayed Data?
Answer
Raw Data (Ungrouped Data): Data in the form as originally collected, without any arrangement. Example: 08, 15, 23, 16, 46, 32, 42, 37, 28, 19 Arrayed Data: Same data arranged in ascending or descendi…
Define Frequency and calculate the frequency of each number in this data: 1, 2, 0, 3, 2, 1, 5, 4, 3, 2, 1, 2
Answer
Frequency: The number of times a particular data value appears in a given set of data. Solution: 0 appears 1 time → frequency = 1 1 appears 3 times → frequency = 3 2 appears 4 times → frequency = 4 3…
What is a Frequency Distribution Table and how do you create one?
Answer
A frequency distribution table is a tabular arrangement showing data values with their corresponding frequencies. Steps to create: 1. List data values in ascending order in first column 2. Use tally …
What is the difference between Grouped and Ungrouped Frequency Distribution?
Answer
Ungrouped Frequency Distribution: Shows frequency of individual data values. Example: Size 3 has frequency 4, Size 4 has frequency 3 Grouped Frequency Distribution: Data is organized into class inter…
What are Class Intervals and Class Limits? Give an example.
Answer
Class Interval: A range of values that groups data together. Class Limits: The boundary values of a class interval. Example: In class interval 10-20: - Lower class limit = 10 - Upper class limit = 20…
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