The following datawere collected as part of a study of coffee consumption amonggraduate students. The following reflect cups per day consumed:
3Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â 6Â Â Â Â Â Â Â Â Â 8Â Â Â Â Â Â Â Â Â 2Â Â Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â 2
X | X2 |
0 | 0 |
1 | 1 |
2 | 4 |
2 | 4 |
3 | 9 |
4 | 16 |
6 | 36 |
8 | 64 |
26 | 134 |
- Compute the sample mean.
- Compute the sample standard deviation.
- Compute the median.
- Compute the first and third quartiles.
- Which measure, the mean or median, is a better measure of atypical value? Justify.
- Which measure, the standard deviation or the interquartilerange, is a better measure of dispersion? Justify.
