Question
In: Statistics and Probability
You have been using the chi-square test of independence to test for association between two variables....
You have been using the chi-square test of independence to test for association between two variables.
1) Give an example of a pair of variables for which you would expect to find no association.
2) Give an example of a pair of variables for which you would expect to find association, but not a causal relationship.
3) Finally, give an example of a pair of variables for which you would expect to find a causal relationship.
Solutions
Expert Solution
1) Give an example of a pair of variables for which you would expect to find no association.
ANs: variable1 = Gender
Variable 2 = Height
So, these two variables might not have any association
2) Give an example of a pair of variables for which you would expect to find association, but not a causal relationship.
Ans: A study shows that there is a negative correlation between a student's anxiety before a test and the student's score on the test. But we cannot say that the anxiety causes a lower score on the test; there could be other reasons—the student may not have studied well, for example. So the correlation here does not imply causation.
3) Finally, give an example of a pair of variables for which you would expect to find a causal relationship.
Ans: However, consider the positive correlation between the number of hours you spend studying for a test and the grade you get on the test. Here, there is causation as well; if you spend more time studying, it results in a higher grade.
orchestra answered 2 years agoRelated Solutions
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
The Chi-Square test of independence is used to determine if there is a significant relationship between...
The Chi-Square test of independence is used to determine if
there is a significant relationship between two nominal categorical
variables. The frequency of one nominal variable is compared with
different values of the second nominal variable. The chi-squared
goodness of fit test is appropriate when the following conditions
are met:
The sampling method is simple random sampling
The variable under study is categorical
The expected value of the number of sample observations in
each level of the variable is at...
When we run a chi-square test of independence on a 2x2 table, the resulting Chi-square test...
When we run a chi-square test of independence on a 2x2 table,
the resulting Chi-square test statistic would be equal to the
square of the Z-test statistic from the Z-test of two independent
proportions. True or false
In performing a chi-square test of independence, as the differences between respective observed and expected frequencies...
In performing a chi-square test of independence, as the
differences between respective observed and expected frequencies
_________, the probability of concluding that the row variable is
independent of the column variable increases.
Stay the same, decrease, increase, or double
Using the Chi-Square test for the difference between two proportions, determine (?=0.05) if there is a...
Using the Chi-Square test for the difference between two
proportions, determine (?=0.05) if there is a difference in
population proportion between male patients using Medicare as their
Payer versus female patients using Medicare as their Payer. Be sure
to set up the null and alternate hypotheses.
Using the Patients dataset, determine if there is a relationship
between length of stay and total charges. Your answer should
include the following:
Scatter Plot
Linear Regression Equation (with interpretation)
Coefficient of Determination (with...
For this assignment, you will create a cross tabs and conduct a chi-square test of independence....
For this assignment, you will create a cross tabs and conduct a
chi-square test of independence. Begin by asking some of your
friends or acquaintances (you'll need both males and females) what
their favorite pet type is, out of a dog, a cat, a hamster, or a
lizard. Then, create a cross tabs (you can use the following
template) with this information. Crosstabs: Gender and Favorite Pet
Type Dog Cat Hamster Lizard Total Female Male Total Once you have
completed...
For this discussion, you will create an example to which the chi-square test of independence could...
For this discussion, you will create an example to which the
chi-square test of independence could be applied. Develop a main
response in which you address the following:
Identify two categorical variables for which a chi-square test
of independence could be conducted.
Describe the categories of each.
Explain why these would be appropriate for this test.
Predict whether or not the chi-square test result would be
significant, and what this would imply about the variables.
Chi Square? Outline the basic ideas behind the chi-square test of independence. What null and alternative...
Chi Square? Outline the basic ideas behind the chi-square test
of independence. What null and alternative hypotheses are used? How
does a chi-square test of homogeneity differ from a chi-square test
of independence? Describe a Goodness of Fit Test. What are the
cells? How many degrees of freedom are there
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Need to answer the following 3 questions from "The Sixties, AMerican Yawp" (just google, you will...
- Write a c++ program to load two column of numbers, do arithmetic operations to the data...
- A forklift can be leased for $3000 per month, with maintenance and insurance included. Alternatively, the...
- Assume that I can borrow money at a rate of 10% per year, but that I...
- The newly elected president Susan implements some policies with the intention of boosting income. She succeeds...
- Multiple Production Department Factory Overhead Rates The total factory overhead for Urban Styles, Inc. is budgeted...
- using this code under, I want when the user input only letter q an error message...
ADVERTISEMENT