Maths Apps.org

Calculate the estimated mean, identify the modal class, and locate the median group for grouped frequency distributions.

Calculate probabilities for fixed number of trials with two outcomes (success/failure) using binomial probability formulas.

Work with simple index numbers, chain base numbers, and weighted indices to measure percentage changes relative to a base year.

Estimate medians, quartiles, and percentiles from cumulative frequency tables and grouped data.

Explore symmetrical bell curves, mean and standard deviation boundaries, and standard z-scores.

Identify extreme values in datasets using the standard 1.5 × IQR rule or standard deviation boundaries.

Play an interactive money-making game to understand the quality assurance process.

Determine positive, negative, or symmetrical skew by comparing mode, median, mean, and Pearson's skewness measure.

Calculate Spearman's rank correlation coefficient (r_s) to evaluate agreement and monotonic trends between two sets of ranked data.

Populate 2-set and 3-set Venn diagrams to solve set notation problems and calculate conditional probabilities.