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Shkiper50 [21]
3 years ago
8

WHO WANTS 20 POINTS!!!!!!!!!!!!!! What is the value of x? Enter your answer in the box. x = Rectangle with a hash mark on the to

p and bottom. The top is labeled 40, and the bottom is labeled 5 x plus 10.
Mathematics
2 answers:
Anastaziya [24]3 years ago
7 0
40= 5x+10
30=5x
6=x
the top and bottom are congruent
adell [148]3 years ago
5 0
X=6
6x5=30
30+10=40
Have a nice day!
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The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

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Step-by-step explanation:

Previous concepts

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 means lies between an upper and lower interval".  

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Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

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