It has been suggested that night shift-workers show more variability in their output
levels than day workers. below, you are given the results of two independent random
samples.
night shift day shift
sample size 9 8
sample mean 520 540
sample variance 38 20
test whether the above statement is true. use a =.05.

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

2

step-by-step explanation:

they charge the same amount at 20 minutes.

step-by-step explanation: