2 years ago

Evaluate the expression. 24÷(−4)+(−2)⋅(−5)=

Mathematics

2 answers:

amm18122 years ago

6 0

4.......................

ValentinkaMS [17]2 years ago

3 0

Answer:

<h3>The answer is 4.</h3>

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Step-by-step explanation:

The confidence interval for population mean is given by :-

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

Given : Sample size : $n= 314$ , which is a large sample , so we apply z-test .

Sample mean : $\overline{x}=346$

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Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Now, a confidence interval at the 95% level of confidence will be :-

$346\pm(1.96)\dfrac{86}{\sqrt{314}}\\\\\approx346\pm9.51\\\\=(346-9.51,\ 346+9.51)\\\\=(336.49,\ 355.51)$

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ZanzabumX [31]

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