,
3. Do one of the following, as appropriate: (a) Find the critical value za/2, (b) find the critical
value ta/2, (c) state that neither the normal nor the t distribution applies.

91%; n = 45; o is known; population appears to be very skewed.
O za/2 = 1.75
0 za/2 = 1.70
Neither the normal nor the t distribution applies.

O ta/2 = 1.34

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)