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3 years ago

Find the measure of the missing angle. 122,79,90,Z

Mathematics

1 answer:

Alexxx [7]3 years ago

7 0

The total amount of angles in quadrilateral is 360.so:

z=360-(122+79+90)
z=360-291
z=69

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$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

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For this case the confidence interval is given by :

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Step-by-step explanation:

Data provided

$\bar X=7.38$ represent the sample mean for the fuel efficiencies

$\mu$ population mean

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The formula for the confidence interval of the true mean is given by:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom for this case is given by:

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The Confidence level for this case is 0.95 or 95%, and the significance level $\alpha=0.05$ and $\alpha/2 =0.025$ and the critical value is given by $t_{\alpha/2}=1.96$

Replcing into the formula for the confidence interval is given by:

$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

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For this case the confidence interval is given by :

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