A researcher wants to know whether people who listen regularly to radio talk shows are more likely to vote in national elections than are people in general. If testing at an alpha level of 0.05, which of the following z-critical values will be used to determine statistical significance?

1)"""+/-1.96"""

2)"""+/-2.58"""

3)"""1.65"""

4)""""2.33"""

5)"""-1.65"""

6)"""-2.33"""