The graph shows the distribution of lifespan (in years) for individuals from species 1 and species 2.
If μ and σ represent mean and standard deviation of the lifespan, respectively, then, which of the following statements is true?
1
μ1 > μ2 ; σ1 > σ2
2
μ1 = μ2 ; σ1 = σ2
3
μ1 = μ2 ; σ1 > σ2
4
μ1 = μ2 ; σ1 < σ2