3 years ago

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

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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