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Tasya [4]
3 years ago
13

Choose the equation and the slope of the line that passes through (7,-1) and is parallel the the x-axis

Mathematics
1 answer:
nika2105 [10]3 years ago
3 0

Answer:

F. Slope: 0

A. Equation: <em>y</em><em> </em>= -1

Step-by-step explanation:

Anything that is set to equal <em>y</em><em> </em>is considered a horizontal line, which is known as a zero slope, therefore, you have your answers.

I am joyous to assist you anytime.

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Suppose a marketing company wants to determine the current proportion of customers who click on ads on their smartphones. It was
andrezito [222]

Answer:

The 92% confidence interval for the true proportion of customers who click on ads on their smartphones is (0.3336, 0.5064).

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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}}

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z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

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92% confidence level

So \alpha = 0.08, z is the value of Z that has a pvalue of 1 - \frac{0.08}{2} = 0.96, so Z = 1.75.

The lower limit of this interval is:

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The upper limit of this interval is:

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The 92% confidence interval for the true proportion of customers who click on ads on their smartphones is (0.3336, 0.5064).

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