How to find the mean, median, mode, variance and standard deviation for a grouped data

In this video, I use a single set of grouped data to explain how to calculate the mean, median, mode, variance, and standard deviation step by step. This lesson is perfect for: Secondary school students WAEC, NECO, JAMB, and IGCSE candidates Anyone struggling with statistics By the end of the video, you will clearly understand both measures of central tendency and measures of dispersion using a frequency table. 📌 Topics covered: Mean of grouped data Median of grouped data Mode of grouped data Variance Standard deviation