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3 years ago

I need help on this question

Mathematics

1 answer:

Troyanec [42]3 years ago

5 0

Hello!

In a taxi cab, the longer you ride, the more it costs. This would make a scatter plot go through Quadrant 1.

Therefore, it would have a positive relationship

I hope this helps!

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Otra forma de representar 42/9

Oksi-84 [34.3K]

Answer:

(84/18, 14/3). These are the same as 42/9

3 0

3 years ago

In a clinical test with 2161 subjects, 1214 showed improvement from the treatment. Find the margin of error for the 95% confiden

Vlad [161]

Answer:

The margin of error for the 95% confidence interval used to estimate the population proportion is of 0.0209.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

In a clinical test with 2161 subjects, 1214 showed improvement from the treatment.

This means that $n = 2161, \pi = \frac{1214}{2161} = 0.5618$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a p-value of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Margin of error:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$M = 1.96\sqrt{\frac{0.5618*0.4382}{2161}}$

$M = 0.0209$

The margin of error for the 95% confidence interval used to estimate the population proportion is of 0.0209.

4 0

3 years ago

Find the solutions of the inequality. Show your work.<br><br> 4b – 3 > –1

Gwar [14]

So we have to find b we are going to try to isosiate b
4b - 3 > -1 now we are going to isosiate the b so add 3 from both side and get 4b > 2

8 0

3 years ago

Solve the inequality for y. y + 4x < -3

Olin [163]

Answer:

$\huge \boxed{y$

Step-by-step explanation:

$y + 4x < -3$

Subtracting 4x from both sides of the inequality.

$y + 4x -4x< -3-4x$

Simplifying the inequality.

$y$

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3 years ago

Why is Li incorrect in saying that the graph shows a direct variation

qwelly [4]

Answer:

The answer B

Step-by-step explanation:

7 0

3 years ago