A desperate statistician believes that using corny stats jokes as pick-up lines will increase the number of dates he goes on. Statisticians, as a group, typically go on 1.3 dates per year, σ = 0.4 To...

A desperate statistician believes that using corny stats jokes as pick-up lines will increase the number of dates he goes on. Statisticians, as a group, typically go on 1.3 dates per year, σ = 0.4

To test whether the statistician is correct, would you use a one-tailed test or two-tailed?