1) Do faculty and students have similar perceptions of what types of behavior are inappropriate in...
1)
Do faculty and students have similar perceptions of what types of behavior are inappropriate in the classroom. Each individual in a random sample of 173 students and 98 faculty members were asked to judge various behaviors on a scale from 1 (totally inappropriate) to 5 (totally appropriate). Data from the behavior “Addressing instructor by first name” are given below.
| Students | Faculty |
| Mean=2.90 | Mean=2.11 |
| StDev=1 | StDev=1 |
| n=173 | n=98 |
Is there sufficient evidence to conclude that the mean “appropriateness” score assigned to addressing an instructor by his or her first name is greater for students than for faculty?
Calcualte a 95% confidence interval for the difference mean score assigned by students vs faculty. (round answers to 4 decimal places. Do NOT include leading zeros. Instead of 0.3456 enter .3456)
Lower Bound: ____
Upper Bound: ____
Conclusion:____
- This interval contians zero, indicating that there is not sufficient evidence to conclude the mean “appropriateness” score assigned to addressing an instructor by his or her first name is greater for students than for faculty.
- This interval contians all positive numbers, indicating that there is sufficient evidence to conclude that the mean “appropriateness” score assigned to addressing an instructor by his or her first name is greater for students than for faculty.
- This interval contians all negative numbers, indicating that there is sufficient evidence to conclude the mean “appropriateness” score assigned to addressing an instructor by his or her first name is greater for students than for faculty.
2)
280 men are found to have an average pulse rate of 73 (beats per minute) with standard deviation 5.4, and 240 women are found to have an average pulse rate of 72 (beats per minute) with standard deviation 7.7. A researcher is interested in whether, on average, men have higher pulse rates than women. What is the most appropriate test for the researcher to use?
| a. |
z-test for the difference between two proportions |
|
| b. |
chi-squared test |
|
| c. |
two sample t-test |
|
| d. |
paired sample t-test |
Homework Answers
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