You are here
Ex 13.2, 6 - Chapter 13 Class 11 Statistics
Last updated at Dec. 16, 2024 by Teachoo
Standard deviation and variance - Discrete frequency (grouped data)
Chapter 13 Class 11 Statistics
Concept wise
- Mean deviation about mean - Ungrouped
- Mean deviation about mean - Discrete Frequency
- Mean deviation about mean - Continuous frequency distibution
- Mean deviation about median - Ungrouped
- Mean deviation about median - Discrete Frequency
- Mean deviation about median - Continuous frequency distibution
- Standard deviation and variance - Ungrouped data
-
Standard deviation and variance - Discrete frequency (grouped data)
- Standard deviation and variance - Continuous frequency (grouped data)
- Co-efficient of variation
- Indirect questions - Multiplication of observation
- Indirect questions - finding remaining observations
- Indirect questions - Incorrect observation
Transcript
Ex 13.2, 6 Find the mean and standard deviation using short-cut method. Mean = a + (∑▒𝑓𝑖𝑦𝑖)/(∑▒𝑓𝑖) × h = 64 + 0/100 ×1 = 64 Standard Deviation = ℎ/𝑁 √(𝑁∑▒𝑓𝑖𝑦𝑖2 − (∑▒𝑓𝑖𝑦𝑖)^2 ) "= " 1/100 √("100" ×"286 – " 〖(0)〗^2 ) = 1/100 √28600 = 169.1/100 = 1.691
