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mihalych1998 [28]

3 years ago

14

Which of the following tools is used by engineers and scientists to document their brainstorming, sketches, design ideas, soluti

ons, and testing results? No links at all just straight forward awnsers please

1 answer:

Verdich [7]3 years ago

4 0

Answer:

sketches design ideas and testing results I'm pretty sure

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If 430 pounds of pebbles cover 1500 square feet, how many pounds of pebbles are necessary to cover 75,000 square feet?

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6500 pounds are necessary to cover 75000 square feet

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When we first learn arithmetic, we focus on working with whole numbers. Then, we extend our understanding to fractions and negat

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Which is the larger amount 4/10 of a dollar or 8/10 of a dollar

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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

xz_007 [3.2K]

Answer: ($3.532, $4.166)

Step-by-step explanation:

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

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

Sample size : n= 157

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

Standard deviation : $\sigma= \$\ 2.421$

The confidence interval for population mean is given by :_

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

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

Hence, the 0% confidence interval for the average tip given at this restaurant = ($3.532, $4.166)

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3 years ago