Statistics Test...

The mean of first ten prime numbers is 

Mode of the data $$3,2,5,2,3,5,6,6,5,3,5,2,5$$ is 

Standard deviation of four observations $$-1, 0, 1$$ and k is $$\sqrt{5}$$ then k will be?

For a random variable $$X$$. If $$E(X)=5$$ and $$V(X)=6$$, then $$E(X^{2})$$ is equal to 

The AM of first $$5$$ whole numbers is:

$$9898, 8998, 9889, 8899, 9988, 8989, 9998$$.
If the numbers above are arranged in an ascending or descending order. Which number will appear in the middle place?

If expected value in n Bernoulli trials is $$8$$ and variance is $$4$$. If $$P(x\leq 2)=\dfrac{k}{2^{16}}$$ then value of k is?

The standard deviation of the data $$6,5,9, 13, 12, 8, 10$$ is 

The mean of $$5$$ observation is $$4.4$$ and variance is $$8.24$$. If three of the five observations are $$1,2$$ and $$6$$, then what are the other two observations ? 

The number of trees in different parks of a city is $$ 33,38,48,33,34,34,33$$ and $$ 24$$. The mode of this data is