3 years ago

What is the answer??? I need help this is due tomorrow. ASAP

1 answer:

8 0

The middle one matches with the middle. The top left matches w the bottom right, and the top right goes to the bottom left.

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Answer: $(21.541,\ 23.059)$

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 : $n=240$ , which is a large sample , so we apply z-test .

Sample mean : $\overline{x}=22.3$

Standard deviation : $\sigma= 6$

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

Critical value : $z_{\alpha/2}=1.960$

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

$22.3\pm(1.960)\dfrac{6}{\sqrt{240}}\\\\\approx22.3\pm0.759\\\\=(22.3-0.759,\ 22.3+0.759)\\\\=(21.541,\ 23.059)$

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ankoles [38]

10P8 = 10!/(10 - 8)! = 10!/2! = 1,814,400

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3 years ago

a train travels 120 miles in 1 1/2 hours. At this rate how many miles will the train travel in 6 hours

Morgarella [4.7K]

Answer:

480 miles

Step-by-step explanation:

120/1.5=80

80*6=480

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Andreas93 [3]

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