Parking at a large university can be extremely difficult at times. One particular university is trying to determine the location of a new parking garage. As part of their research, officials are interested in estimating the average parking time of students from within the various colleges on campus. A survey of 338 College of Business (COBA) students yields the following descriptive information regarding the length of time (in minutes) it took them to find a parking spot. Note that the "Lo 95%" and "Up 95%" refer to the endpoints of the desired confidence interval. Variable N Lo 95% CI Mean Up 95% CI SD Parking Time 338 9.1944 10.466 11.738 11.885 Give a practical interpretation for the 95% confidence interval given above. We are 95% confident that the average parking time of the 338 COBA students surveyed falls between 9.19 and 11.74 minutes. We are 95% confident that the average parking time of all COBA students falls between 9.19 and 11.74 minutes. 95% of the COBA students had parking times that fell between 9.19 and 11.74 minutes. 95% of the COBA students had parking times of 10.466 minutes.
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Parking at a large university can be extremely difficult at times. One particular university is trying to determine the location of a new parking garage. As part of their research, officials are interested in estimating the average parking time of students from within the various colleges on campus. A survey of 338 College of Business (COBA) students yields the following descriptive information regarding the length of time (in minutes) it took them to find a parking spot. Note that the "Lo 95%" and "Up 95%" refer to the endpoints of the desired confidence interval.
| Variable | N | Lo 95% CI | Up 95% CI | SD | |
| Parking Time | 338 | 9.1944 | 10.466 | 11.738 | 11.885 |
Give a practical interpretation for the 95% confidence interval given above.
- We are 95% confident that the average parking time of the 338 COBA students surveyed falls between 9.19 and 11.74 minutes.
- We are 95% confident that the average parking time of all COBA students falls between 9.19 and 11.74 minutes.
- 95% of the COBA students had parking times that fell between 9.19 and 11.74 minutes.
- 95% of the COBA students had parking times of 10.466 minutes.
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