Sometimes the extent to which two groups differ is quite obvious. For example, if one group of individuals has a mean of 20 speeding tickets, while another group has a mean of 2, we can be pretty sure that the difference is statistically significant. But sometimes it is less clear. What if one group had a mean of 10, while the other had a mean of 7? T-tests provide a way to determine if differences between means are enough to be statistically significant. Freshmen and Seniors For this assignment, you will conduct a two-sample t-test to determine if college freshmen and seniors have a significantly different number of speeding tickets. Using the data provided below, conduct a two-sample t-test. Speeding Tickets for Freshmen and Seniors Freshmen Seniors 2 1 1 2 4 1 2 1 5 0 1 2 0 1 2 0 4 1 2 2 Then, create a summary of 1-2 paragraphs in which you address the following:
Sometimes the extent to which two groups differ is quite obvious. For example, if one group of individuals has a
Freshmen and Seniors
For this assignment, you will conduct a two-sample t-test to determine if college freshmen and seniors have a significantly different number of speeding tickets. Using the data provided below, conduct a two-sample t-test.
|
Speeding Tickets for Freshmen and Seniors |
|
|
Freshmen |
Seniors |
|
2 |
1 |
|
1 |
2 |
|
4 |
1 |
|
2 |
1 |
|
5 |
0 |
|
1 |
2 |
|
0 |
1 |
|
2 |
0 |
|
4 |
1 |
|
2 |
2 |
Then, create a summary of 1-2 paragraphs in which you address the following:
- Present the result of the two-sample t-test.
- Explain whether or not the result is statistically significant.
- Discuss what this implies for freshmen and seniors, and whether or not the results fit with your own expectations.
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