OBSERVATIONS

Statement: 1. Some students are listeners. 2. Some listeners are observers. 3. Many students are not observers. Conclusion: I. Some students are observers. II. Some observers are not students. III. Some observers are listeners.

Observe and discuss. Observe the following pictures and discuss the characters observed.

The variance of 20 observation is 5. If each observation is multiplied by 2, then what is the new variance of the resulting observation?

The variance of 20 observation is 5. If each observation is multiplied by 2, then what is the new variance of the resulting observation?

The variance of 20 observation is 5. If each observation is multiplied by 3, then what is the new variance of the resulting observation?

The mean of 11 obervation is 50. If the mean of first Six observation is 49 and that of last six observation is 52, then find sixth observation.