This topic contains a solution. Click here to go to the answer

Author Question: The mean and variance of a chi-square distribution with degrees of freedom is determined by the ... (Read 102 times)

daltonest1984

  • Hero Member
  • *****
  • Posts: 536
The mean and variance of a chi-square distribution with  degrees of freedom is determined by the number of degrees of freedom.
 
  Indicate whether the statement is true or false

Question 2

What is the rationale for df = (r - 1 )(c - 1 ) in conducting a chi-square test of independence for a contingency table with r rows and c columns?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tandmlomax84

  • Sr. Member
  • ****
  • Posts: 323
Answer to Question 1

TRUE

Answer to Question 2

The rationale for df = (r - 1 )(c - 1 ) is that this quantity represents the number of cell frequencies that are free to vary. Given that we know the sample size (the total number of observations in the table), we need to know the contents of (r - 1 ) rows and (c - 1 ) columns in order to completely fill in the cells within the r  c table.





 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

For a complete list of videos, visit our video library