STAT 500 Quiz
Question 1
What is being tested when the Goodness-of-Fit test is used to analyze the data?
Answer
[removed] | The difference between the means of three variables. | |
[removed] | The difference between the means of two variables. | |
[removed] | The difference between the observed and measured frequency of an outcome. | |
[removed] | The difference between the expected and observed frequency of an outcome. |
5 points
Question 2
Which of the following occurs when the chi square value is small
[removed] | Large p-value, fail to reject H0 | |
[removed] | Large p-value, reject H0 | |
[removed] | Small p-value, reject H0 | |
[removed] | Small p-value, fail to reject H0 |
(Explanation: if chi square value is smaller than chi square critical = fail to reject, secondly, p value small than α value = fail to reject)
5 points
Question 3
If the chi square test suggests that you should fail to reject H0, what can you conclude?
Answer
[removed] | There is not good fit with the observed and assumed distribution. | |
[removed] | There is good fit with the observed and assumed distribution. | |
[removed] | The chi square value is probably large. | |
[removed] | The p-value is probably small. |
5 points
Question 4
The table below summarizes results from an experiment in which subjects were classified as diabetic or nondiabetic and then given a treatment. After the treatment, they were again classified as diabetic or nondiabetic. Which combinations of before treatment/after treatment categories will yield discordant pairs?
|
| Before Treatment | |
|
| Diabetic | Nondiabetic |
After Treatment | Diabetic | 9 | 6 |
Nondiabetic | 22 | 12 | |
Answer
[removed] | Only diabetic/nondiabetic | |
[removed] | Nondiabetic/nondiabetic and diabetic/diabetic | |
[removed] | Diabetic/nondiabetic and nondiabetic/diabetic | |
[removed] | Only nondiabetic/nondiabetic |
10 points
Question 5
The table below summarizes results from an experiment in which subjects were classified as asthmatic or nonasthmatic and then given a treatment. After the treatment, they were again classified as asthmatic or nonasthmatic. How many subjects were included in the experiment?
|
| Before Treatment | |
|
| Asthmathic | Nonasthmatic |
After Treatment | Asthmathic | 9 | 2 |
Nonasthmatic | 15 | 6 | |
Answer
[removed] | 15 | |
[removed] | 32 | |
[removed] | 8 | |
[removed] | 24 |
12 years ago
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