Answer:
a) [tex]s[/tex]
b) [tex]\sigma[/tex]
c) [tex]s^{2}[/tex]
d) [tex]\sigma^{2}[/tex]
Step-by-step explanation:
you use s for samples and σ for population, and the variance is the square of standard deviation
a) [tex]s[/tex]
b) [tex]\sigma[/tex]
c) [tex]s^{2}[/tex]
d) [tex]\sigma^{2}[/tex]