The following table shows the annual incomes (in thousands of dollars) for two separate groups.
| Group | Sample Size | Mean Income | Standard Deviation |
|---|---|---|---|
| P | 700 | 55 | 3.2 |
| Q | 700 | 55 | 4.8 |
Which statement is justified by the given data?
Group P and Group Q have identical distributions of income.
The mean income is higher in Group Q than in Group P.
The distribution of incomes in Group Q has a greater spread than Group P.
The lowest income in Group Q is lower than the lowest income in Group P.
