Answer:a
a
Step-by-step explanation:
i took the test
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Step-by-step explanation:
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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%)
Okay so here's how i think you solve it
both triangles have the same ratio, so set it as 3/4.5 (the smaller triangle) is equal to X/13.5 (the 9 added to the 4.5)
multiply 13.5/1 on both sides to get x alone
13.5 3
-------- x ------- = x x= 9
1 4.5
This is what the graph looks like hope this helps:)