Chapter 16
- When should the correction for continuity be used?
- A die is suspected of being biased. It is rolled 24 times with the following
result.
Outcome
|
Frequency
|
1
|
8
|
2
|
4
|
3
|
1
|
4
|
8
|
5
|
3
|
6
|
0
|
Conduct a significance test to see if the die is biased.
- When can you use either a Chi Square or a z test and reach the same conlcusion?
- Ten subjects are each given two flavors of ice-cream to taste and say whether
they like them. One of the 10 liked the first flavor and seven out of 10 liked
the second flavor. Can the Chi Qquare test be used to test whether this difference
in propotions (.10 versus .70) is significant? Why or why not?
- A recent experiment investigated the relationship between smoking and urinary
incontinence. Of 322 subjects in the study who were incontinet, 113 were smokers,
51 were former smokers, and 158 had never smoked. Of 284 control subjects
who were not incontinent, 68 were smokers, 23 were former smokers, and 193
had never smoked. Do a significance test to see if there is a relationship
between smoking and incontinence.
Selected Answers