Class 9 Statistics Worksheet – Complete Practice Guide
Statistics helps Class 9 students collect, organize, summarize and interpret numerical information. This Class 9 Statistics Worksheet is designed for online practice, revision, homework and test preparation. Fresh numerical combinations allow learners to practise the same ideas without relying on a fixed list of repeated questions.
Mean
The mean or average is found by adding all observations and dividing their sum by the number of observations. It represents a central value of a data set.
In a frequency table, each observation is multiplied by its frequency and the products are added before dividing by total frequency.
Median
The median is the middle observation after arranging the data in ascending or descending order. For an odd number of observations, use the single middle value. For an even number, average the two middle observations.
Mode
The mode is the observation occurring most often. Frequency tables make mode questions particularly clear because the largest frequency identifies the modal observation.
Range
Range describes the spread between the largest and smallest values.
Frequency Tables and Interpretation
A frequency table records how many times observations occur. Always distinguish an observation from its frequency. In interpretation questions, first identify headings and units, then compare values or calculate the requested statistic.
Missing Values
For a missing observation, multiply the given mean by the total number of observations to find the required total. Subtract the known observations to obtain the missing value.
How to Practise
Select the number of questions, question type, difficulty and optional timer. Press Start New Test. Enter an answer and press Check Answer. The answer remains hidden until checking. Correct answers turn green and incorrect answers turn red; Show Answer becomes available only after checking. The progress bar and final score provide immediate feedback.
Smart Study Tips
Arrange data before finding a median. Recheck totals before finding a mean. For frequency tables, verify the total frequency. Estimate an answer before submitting it so unreasonable results are easier to catch. Start with Easy questions while learning, then use Mixed or Hard mode for exam preparation. Use Print or Save as PDF for offline revision.
This worksheet is mobile friendly and suitable for students, parents and teachers. Randomized data, seven practice types, difficulty controls, optional timer, progress tracking, sound feedback and separate Print/PDF actions make Statistics revision flexible and engaging.