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Cloud [144]
2 years ago
5

A total of 12,650 voters completed an online survey that asked if they are going to vote for a certain political canidate in an

upcoming
election. how many said they are not going to vote for the candidate
Mathematics
1 answer:
Masteriza [31]2 years ago
5 0

Answer:You have roughly the same chance of being called as anyone else living in the United States who has a telephone. This chance, however, is only about 1 in 154,000 for a typical Pew Research Center survey. To obtain that rough estimate, we divide the current adult population of the U.S. (about 235 million) by the typical sample size of our polls (usually around 1,500 people). Telephone numbers for Pew Research Center polls are generated through a process that attempts to give every household in the population a known chance of being included. Of course, if you don’t have a telephone at all (about 2% of households), then you have no chance of being included in our telephone surveys.

Step-by-step explanation:

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Vlad the Impaler promotes many of his soldiers into generals (don't ask what happened to the past generals). Haley thinks the pr
marin [14]

Using the formula for the margin of error, it is found that Haley should sample 12,724 soldiers.

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of \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 \frac{1+\alpha}{2}.

The margin of error is of:

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

Estimate of the proportion of 64%, hence \pi = 0.64.

94% confidence level

So \alpha = 0.94, z is the value of Z that has a p-value of \frac{1+0.94}{2} = 0.97, so z = 1.88.  

Margin of error of <u>less than 0.008</u> is wanted, hence, we have to find n when M = 0.008.

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

0.008 = 1.88\sqrt{\frac{0.64(0.36)}{n}}

0.008\sqrt{n} = 1.88\sqrt{0.64(0.36)}

\sqrt{n} = \frac{1.88\sqrt{0.64(0.36)}}{0.008}

(\sqrt{n})^2 = (\frac{1.88\sqrt{0.64(0.36)}}{0.008})^2

n = 12723.84

Rounding up, Haley should sample 12,724 soldiers.

A similar problem is given at brainly.com/question/25404151

4 0
2 years ago
What is the rate of change from x = 0 to x = pi over 2 ? (6 points) trig graph with points at: (0, negative 4) and (pi over 2, 0
Sedaia [141]

Answer:

Rate of Change : 8 / π

Step-by-step explanation:

To determine this rate of change, we have to first consider the points at x = 0 and x = π / 2.

When x = 0, f( x ) = - 4,

When x = π / 2, f( x ) = 0

Remember that rate of change is represented by a change in y / change in x. Therefore,

( 0 - ( - 4 ) ) / ( π / 2 - 0 ),

( 0 + 4 ) / ( π / 2 ),

4 / π / 2 = 8 / π

Therefore the rate of change from x = 0 ➡ x = π / 2 will be 8 / π.

3 0
3 years ago
Read 2 more answers
MATH PLS HELPPP BRANLIETS 5 POINTS!!!!!!!!!!
Gwar [14]

Answer:

A?

Step-by-step explanation:

I think it is A but I'm not 100% sure

8 0
3 years ago
Read 2 more answers
Solve the following equation for x.
Crazy boy [7]
X=(-4) or X= 4
add 112 to both sides
divide both sides by 7
then take the square root of 16
5 0
2 years ago
Read 2 more answers
Can someone help with this one?
Vedmedyk [2.9K]

Answer:

(a) 0.05 minutes per calorie burned

(b) Slope = 20

Step-by-step explanation:

(a) If 200 calories are burned in 10 minutes...then what about 1 calorie

; 1/200 × 10 = 0.05 minutes

(b) Slope of the graph...;just take any two points on the graph...which are (10;200) and (20;400)

Slope = (400 - 200) ÷ (20 - 10)

;Slope = 200 ÷ 10

;Slope = 20

7 0
3 years ago
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