Guess my dogs name for 5 points

4sentences over a chronicle of a teen killer

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.

The difference between the observed value and the mean of the set of values is a