3 years ago

Help me out please!!

Mathematics

1 answer:

Harrizon [31]3 years ago

3 0

Answer:

(x+5)² + (y+2)² = 5²

Step-by-step explanation:

(x-p)² + (y-q)² = r²

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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%)

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4 years ago

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Oduvanchick [21]

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Step-by-step explanation:

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kykrilka [37]

Answer:

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