Statistics

Mean of Grouped Data Class 10: Formula & 3 Methods

A Class 10 guide to the mean of grouped data — the class-mark idea, the formula x̄ = Σfᵢxᵢ/Σfᵢ, and the direct, assumed-mean and step-deviation methods, all shown on one data set that gives the same answer 25.8.

Measures of Central Tendency Class 10: Mean, Median, Mode

A clear Class 10 overview of the three measures of central tendency — mean, median and mode of grouped data — with each formula, the class-mark idea, when to use each measure, and the empirical relationship, with a worked example.

Median of Grouped Data Class 10: Formula & Examples

A Class 10 guide to the median of grouped data — cumulative frequency, how to find the median class, the formula Median = l + ((n/2 − cf)/f) × h, a worked example giving 25.33, and the empirical relationship linking mean, median and mode.

Mode of Grouped Data Class 10: Formula & Examples

A Class 10 guide to the mode of grouped data — what the modal class is, the mode formula with every variable defined, and worked examples giving a mode of 24.17, plus when the mode is the right measure to use.

Statistics Class 10: How to Approach and Master the Chapter

A methodology-first guide to Statistics Class 10 Maths - mean, median and mode of grouped data, how CBSE tests it, common mistakes, and your roadmap to full marks.