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3 years ago

Andrew is shooting arrows at a target.

Mathematics

1 answer:

Nikitich [7]3 years ago

3 0

Answer:

Step-by-step explanation:

60/4 = 15

So, Andrew would probably hit a bullseye 15 times.

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ivann1987 [24]

Answer:

Step-by-step explanation:

$y=\frac{1}{x-m} +b$ where - m is the distance moved to the right and + b is the distance moved up. So, your solution is $y=\frac{1}{x+2}+2$

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3 years ago

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Roman55 [17]

Answer:

values of y are

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3 years ago

A random sample of 130 students is chosen from a population of 4,500 students. The mean IQ in the sample is 120, with a standard

barxatty [35]

Answer:

$120-2.614\frac{5}{\sqrt{130}}=118.85$

$120+2.614\frac{5}{\sqrt{130}}=121.15$

Step-by-step explanation:

Information given

$\bar X= 120$ represent the sample mean

$\mu$ population mean (variable of interest)

s=5 represent the sample standard deviation

n=130 represent the sample size

For this case we can't set a margin of error just with a % since they not specify 1.13% respect to something for this case we can omit this value

Confidence interval

The confidence interval for the mean is given by the following formula:

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

The degrees of freedom are given by:

$df=n-1=130-1=129$

The Confidence level is 0.99 or 99%, the significance would be $\alpha=0.01$ and $\alpha/2 =0.005$ , and the critical value would be $t_{\alpha/2}=2.614$

And replacing we got:

$120-2.614\frac{5}{\sqrt{130}}=118.85$

$120+2.614\frac{5}{\sqrt{130}}=121.15$

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3 years ago

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Veronika [31]

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