Chi-Squared

Which of the following is true about the X^2 distribution?

• 
  It is Symmetric around 0

• It is defined by a given mean and Standard deviation

• It only takes on positive values

When finding a p-val with the Chi^2 distribution we always treat it as right tailed.

• 
  True

• False

When finding a p-val with the Chi^2 distribution we always treat it as right tailed.

(Find a X^2 table for the next question!)

• True

• False

Suppose you have a chi-square test statistic of 20.124 with 15 degrees of freedom. The p-value is:

• less than 0.05.

• 
  between 0.05 and 0.1.

• 
  greater than 0.1

If we reject a CHi^2 test, we must follow up with which cells' contribution appear to have caused us to reject.

• True

• False

The Null hypothesis for a A Chi^2 Goodness of fit test is always p1=p2=...pn (equality):

• True

• False

The Null for a X^2 Goodness of fit test is always that the data fits the hypothesized distribution, while the alternative is that it does not

• True

• False

What is your df for a X^2 Goodness of fit test?

• 
  n-1

• (r-1)(c-1)

• k(# of groups)-1

The Null hypothesis for a Chi^2 Two-Way table test for association is always that there is no association, while the alternative is that there is

• True

• False

What is your df for a X^2 Two-Way table test?

• 
  n-1

• (r-1)(c-1)

• k(# of groups)-1