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3 years ago

4/175.68 show ur please

Mathematics

2 answers:

matrenka [14]3 years ago

5 0

175.68 divided 4 is 43.92 because
175.68
-16
15
-12
36
-36
08
-8
0

LekaFEV [45]3 years ago

3 0

4/175.68 = 43.92
First you put 4 above the 17 then you should get 16 and you subtract that and you will get 1 the add the 5 and you will get 15. Then you put 3 over the 5 and you should get 12 then you subtract 15 by 12 and you should get 3 then add the 6 and you should have 36. Then you put a 9 over the 6 and you should get 36 and you subtract that and you get 0. Then you put a 2 over the 8 and you should get 8 The you subtract that and you get 0 so your final answer should be 175.68/4 = 43.92

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$\frac{(99)(10)^2}{123.225} \leq \sigma^2 \leq \frac{(99)(10)^2}{77.046}$

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Now we just take square root on both sides of the interval and we got:

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Data given and notation

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A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

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Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical values.