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2 years ago

Please help me on this!

Mathematics

1 answer:

Vesnalui [34]2 years ago

8 0

Answer:

A. strong negative relationship

Step-by-step explanation:

This graph has a negative correlation. You can easily tell because the value of the computer is going down as the years pass.

The correlation coefficient for this graph is -0.9914443

This is a strong negative relationship

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An advertising agency that serves a major radio station wants to estimate the mean amount of time the station’s audience members

Flura [38]

Answer:

$n=(\frac{1.645(45)}{5})^2 =219.18 \approx 220$

So the answer for this case would be n=220 rounded up to the nearest integer

Step-by-step explanation:

Information given

$\sigma = 45$ represent the population deviation

$ME = 5$ represent the margin of error

The margin of error for the true mean is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =5 and we are interested in order to find the value of n, if we solve n from equation (4) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 90% of confidence interval now can be founded using the normal distribution. The significance level is $\alpha=1-0.9=0.1$ and the critical value would be $z_{\alpha/2}=1.645$ , replacing into formula (b) we got:

$n=(\frac{1.645(45)}{5})^2 =219.18 \approx 220$

So the answer for this case would be n=220 rounded up to the nearest integer

5 0

3 years ago

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A tree that is 100 feet tall casts a shadow that is 150 feet long. Determine the angle at which the rays of the sun hit the grou

Fofino [41]

The answer is 33 degrees. Hope this helped <span />

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2 years ago

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Diane will rent a car for the weekend. She can choose one of two plans. The first plan has an initial fee of $42 and costs an ad

jarptica [38.1K]

The two plans cost the same at 450miles.

The cost is $118.50 when the two plans cost the same.

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6 0

3 years ago

6ft and 10ft =? it's the pythagorean theorem

anyanavicka [17]

Answer:

11.7

Step-by-step explanation:

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apply that same formula soo $6^{2} +10^{2}=136^{2}$

then sqaure root 136 $\sqrt{136} =11.66190379$

round that soo now the answer is 11.7

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3 years ago

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Which graph shows the rule: output = 5 times the input ? explain please!!

kolezko [41]

The 2nd graph show the rule

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3 years ago