8

Question 1

What does the probability distribution tell you? 3•

Answer 1

•sample space
•method for computing probabilities
•How the random variable behaves

Question 2

Skewed distribution?

Answer 2

When there is a lump in one side of the distribution and then the tail flattens out in the other side. If its right skewed, then the tail levels off in the right.

Question 3

If random variable X has a standard normal distribution, then X^2 will have a chi-square distribution with?

Answer 3

1 df

Question 4

The sum of two independent chi^2 random variables, then the df is the total of?

Answer 4

Sum of Individual degrees of freedom. X^2_r + X^2_s = new X^2_df=r+s

Question 5

What is the big relevance or meaning of chi-squared distribution?

Answer 5

A continuous random variable near the mean of 0 happens way more often than moving away from 0 towards the tail.

Question 6

Chi-square starts at a random variable of?

Answer 6

0

Question 7

sample space for a random variable in F distribution consists of only?

Answer 7

Positive values

Question 8

A random variable with F distribution ins an example of a what skewed distribution?

Answer 8

Right skewed distribution

Question 9

The quotient of two independent chi^2 random variables produces a random variable with an F distribution. The degrees of freedom from the numerator is ____ and denominator is _____?

Answer 9

d_1, d_2