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galben [10]
3 years ago
8

Pls ASAP solve this question

Mathematics
1 answer:
vredina [299]3 years ago
3 0

answer:

ii- 7

iii- 5

Step-by-step explanation:

sorry if its wrong im not for sure

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In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies. They describe ad agency outp
fredd [130]

Answer: (7.27%, 7.55%)

Step-by-step explanation:

As per given , we have

Sample size : n= 392

Sample mean : \overline{x}=7.41\%

\sigma=1.43\%

Critical two-tailed z-value for 95% confidence = z_{\alpha/2}=1.96

Required confidence interval would be :

7.41\%\pm (1.96)\dfrac{1.43\%}{\sqrt{392}}\\\\=7.41\%\pm 0.14\%\\\\=(7.27\%, 7.55\%)

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%)

7 0
4 years ago
(3+2i)+(5+7i) equals
dlinn [17]
I simplify so is 

8+9i
6 0
4 years ago
4 divided by 2/5<br><br> 2.4 divided by 3/5
Sav [38]

Answer:

4 divided by 2/5 is 10

2.4 divided by 3/5 is 4

I hope I helped ^^

7 0
3 years ago
Geometry help please
Mariana [72]
The volume of a sphere is:

V=(4πr^3)/3, and you are told that r=5in so

V=(4π125)/3

V=500π/3 in^3

V≈523.60 in^3
4 0
3 years ago
An angle measures 88° more than the measure of its supplementary angle. What is the measure of each angle?
Ghella [55]

134 and 46

134-88=46

46+134=180

7 0
4 years ago
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