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3 years ago

. Find the distance between points A and B on the graph below.

Mathematics

1 answer:

dmitriy555 [2]3 years ago

3 0

U can just find the slope. From B to A it is up 8 and 3 to the right. So 8/3 which is 2.6 rounded. The answer is C

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A class of 50 students elected a class president. Candidate A received 15 votes. Candidate B received 25 votes. The remainder of

kifflom [539]

The percentage of votes for candidate B Is 30%

7 0

3 years ago

Find the measure of the are or central angle indicated. Assume that lines which appear to be

Alina [70]

9514 1404 393

Answer:

?° = 153°

Step-by-step explanation:

The measure of an arc is the same as the measure of the central angle it subtends. The arc is marked 153°. The central angle (?°) has that same measure.

?° = 153°

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3 years ago

6 165.1 159.2 163.5 174.8 173.2 177.6 174.3 164.1 171.4 find the median

Katen [24]

159.2, 163.5, 164.1, 171.4, 173.2, 174.3, 174.8, 177.6, 6165.1

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5 0

3 years ago

Suppose that a local TV station conducts a survey of a random sample of 120 registered voters in order to predict the winner of

forsale [732]

Answer:

a) The 99% CI for the true proportion of voters who prefer the Republican candidate is (0.3658, 0.6001). This means that we are 99% sure that the true population proportion of all voters who prefer the Republican candidate is (0.3658, 0.6001).

b) The upper bound of the confidence interval is above 0.5 = 50%, which meas that the candidate can be confidence of victory.

Step-by-step explanation:

Question a:

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 $1 - \frac{\alpha}{2}$ .

Sample of 120 registered voters in order to predict the winner of a local election. The Democrat candidate was favored by 62 of the respondents.

So 120 - 62 = 58 favored the Republican candidate, so:

$n = 120, \pi = \frac{58}{120} = 0.4833$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a p-value of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4833 - 2.575\sqrt{\frac{0.4833*0.5167}{120}} = 0.3658$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4833 + 2.575\sqrt{\frac{0.4833*0.5167}{120}} = 0.6001$

The 99% CI for the true proportion of voters who prefer the Republican candidate is (0.3658, 0.6001). This means that we are 99% sure that the true population proportion of all voters who prefer the Republican candidate is (0.3658, 0.6001).

b. If a candidate needs a simple majority of the votes to win the election, can the Republican candidate be confident of victory? Justify your response with an appropriate statistical argument.

The upper bound of the confidence interval is above 0.5 = 50%, which meas that the candidate can be confidence of victory.

8 0

3 years ago

Math. Will Upvote. Please help

Mademuasel [1]

1) True. In a function, each x value has exactly one y value.
2) False. For example $x^2$ is a function, but is not linear. It is represented by a parabola.

6 0

3 years ago