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1- If variance of a data set is 0.04, then the variance of the same data...

1- If variance of a data set is 0.04, then the variance of the same data set is:

2- Variance of 6, 6, 6, 6, 6, 6, 6 is

3- The mean weight of students in a class is 100 and standard deviation is 21 What is the standard deviation of sample means of sample size 49.

4- Average weight of a large class is normally distributed with mean 70 kg and standard deviation 5 kg. One student is randomly selected from this class. Find the probability that his weight will be more than 80 kg 1. i.e. P(x > 80) =?

5- P ( -1.96 < Z < 1.96) =

Math   Statistics-And-Probability   
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