2 years ago

What is the difference in the account balances shown below? Behrooz: (-$21.00) Cody: $3.00

Mathematics

1 answer:

suter [353]2 years ago

4 0

Answer:

-7

Step-by-step explanation:

-21.00/3.00

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The dataset Restaurant Tips contains data recorded from 157 restaurant bills at a bistro in New York over a two week period and

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Answer: ($3.532, $4.166)

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Given : Significance level : $\alpha: 1-0.90=0.10$

Critical value : $z_{\alpha/2}=1.645$

Sample size : n= 157

Sample mean : $\overline{x}=\$\ 3.849$

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$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

$\text{i.e. }\$\ 3.849\pm (1.64)\dfrac{2.421}{\sqrt{157}}\\\\\approx\$\ 3.849\pm0.317\\\\=(\$\ 3.849-0.317,\$\ 3.849+0.317)=(\$\ 3.532,\$\ 4.166)$

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