calculate mean and standard deviation from the following data using direct method

size 10-20 20-30 30-40 40-50 50-60 60-70 70-80

frequency 5 10 15 20 25 18 78

Question

calculate mean and standard deviation from the following data
using direct method
size 10-20 20-30 30-40 40-50 50-60 60-70 70-80
frequency 5 10 15 20 25 18 78

Aarin Jindal · Answer

Please find this answer
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calculate mean and standard deviation from the following data using direct method size 10-20 20-30 30-40 40-50 50-60 60-70 70-80 frequency 5 10 15 20 25 18 78

calculate mean and standard deviation from the following data using direct method

size 10-20 20-30 30-40 40-50 50-60 60-70 70-80

frequency 5 10 15 20 25 18 78