Using a 0.05 level of significance, is there a difference in the variability of salaries between black belts and green belts? Based on the result of (a), which t test defined in Section 10.1 is appropriate for comparing mean salaries? Using a 0.05 level of significance, is the mean salary of black belts greater than the mean salary of green belts?

22

step-by-step explanation:

22

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm