Answer: (7.27%, 7.55%)
Step-by-step explanation:
As per given , we have
Sample size : n= 392
Sample mean : 

Critical two-tailed z-value for 95% confidence = 
Required confidence interval would be :

Hence, the required 95% confidence interval for the mean percentage share of billing volume from network television for the population of all U.S. advertising agencies : (7.27%, 7.55%)
Answer:
x=1/2
Step-by-step explanation:
Answer: y = -1
Explanation: the y axis is the vertical line, the crossing line intersects at -1.
Hope this helps!
Answer:
All Real
Step-by-step explanation:
Answer: 0.00215
Step-by-step explanation:
10^-3 =0.001
2.8 • 0.001 - 0.00065
=0.00215