Question
In: Math
What are the characteristics of chi-square distributions?
What are the characteristics of chi-square distributions?
Solutions
Expert Solution
Chi -square dist is denoted by 
with 'v' degrees of freedom.
The chi-square distribution has the following characteristics:
- It is the sum of squares 'v' independent standard normal variables
= 
- Chi squares are positively skewed.
- They have thicker tails than normal since it estimates high probability for extreme events.
- The mean of the distribution is equal to degrees of freedom:
= v - The variance is equal to two times the degrees of freedom:
= 2 *
v - As the degrees of freedom increase, the chi-square curve looks like a normal distribution.
- Chi-square test are used for goodness of fit test , independence test .
= v
= 2 *
v
= 
= 
milcah answered 1 year agoRelated Solutions
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Question 1 Both F and Chi Square distributions are unimodal and symmetric True False Question 2...
Question 1
Both F and Chi Square distributions are unimodal and
symmetric
True
False
Question 2
Both F and Chi Square distributions vary with df
True
False
Question 3
Both F and Chi Square distributions can be used to compare
multiple sample means
True
False
Question 4
For Chi Square tests, all tests discussed can be used for both
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True
False
Question 5
For ANOVA: the null hypothesis is: Mu1 = Mu2 = Mu3......etc
True
False
Question...
Chi-Square Test for Independence Using Chi-Square, we are looking to see if there is a significant...
Chi-Square Test for Independence
Using Chi-Square, we are looking to see if there is a
significant difference between what we would expect results to be,
and what the actual results were. That is, expected vs.
observed. Use alpha = .05
Listed below are data from a survey conducted recently where
Males and Females responded to their happiness with their
supervisor (this is fictitious data).
Response
Male
Female
Total
Not at all
23
25
48
Somewhat
13
22
35
Very
26...
Chi-Square Test for Independence Using Chi-Square, we are looking to see if there is a significant...
Chi-Square Test for Independence
Using Chi-Square, we are looking to see if there is a
significant difference between what we would expect results to be,
and what the actual results were. That is, expected vs.
observed. Use alpha = .05
Listed below are data from a survey conducted recently where
Males and Females responded to their happiness with their
supervisor (this is fictitious data).
Response
Male
Female
Total
Not at all
23
25
48
Somewhat
13
22
35
Very
26...
Choose either the Chi Square Goodness of Fit test OR the Chi Square Test for Independence....
Choose either the Chi Square Goodness of Fit test OR the Chi
Square Test for Independence. Give an example of a research
scenario that would use this test, including your hypothesis AND
what makes the test suitable for your variables chosen
Chi Square Test We will now use Excel to run an example of a chi square...
Chi Square Test
We will now use Excel to run an example of a chi square test.
Chi square test is checking the independence of two variables. Our
example will test if taking hormonal pills and being overweight are
related. We will test the independence on 200 random patients.
Thus, N=200. They will be divided first into two groups, those who
take hormonal pills and those who do not. Second, they will be
divided into three groups based on weight,...
What is the chi-square distribution? Explain your answer?
What is the chi-square distribution? Explain your
answer?
what is the difference between chi square and z test?
what is the difference between chi square and z test?
3.Both F and Chi Square distributions can be used to compare multiple sample means T/F 4.For...
3.Both F and Chi Square distributions can be used to compare
multiple sample means T/F
4.For Chi Square tests, all tests discussed can be used for both
experiments and surveys T/F
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