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Nata [24]
3 years ago
6

Greatest president ~ A Gallup Poll of American adults in February 2009 asked the following question. "Which of the following pre

sidents would you regard as the greatest: Washington, Franklin Roosevelt, Lincoln, Kennedy, or Reagan?" The order of the presidents was rotated to avoid bias. Based on the sample, a 95% confidence interval for the actual proportion American adults who choose Lincoln as the greatest is given by (0.1759, 0.2204).
What is the sample proportion? Give the exact answer as a decimal.
Mathematics
1 answer:
Anastasy [175]3 years ago
6 0

Answer:

The sample proportion is 0.19815

Step-by-step explanation:

A confidence interval has two bounds, a lower bound and an upper bound. The sample proportion is the halfway point between these two bounds, that is, the sum of the bounds divided by 2.

In this problem, we have that:

Lower bound: 0.1759

Upper bound: 0.2204

Sample proportion:

(0.1759 + 0.2204)/2 = 0.19815

The sample proportion is 0.19815

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Evaluate the piecewise-defined function for the indicated values. I’m just unsure of how to solve when the value isn’t given dir
Fantom [35]

The value of the function at t=0 is 9 , 6<x<7 is -t+5, 1<n<2 is 9, for m^{2} +1 is 9.

Given function which is 9 for 0 to 5 , -t+5 for 5 to 8 and \sqrt{t-1} for 8<t<11.

A) We have to find the function at t=0 which is 9 because it lies between 0<=t<5.

B) In this we have to find the value of the function when x=t lies between 6 and 7. is -t+5.

C) In this we have to find the value of Q(n) when n lies between 1 and 2 and the value becomes 9 because it lies between 0 and 5.

D) In this we have to find the function at m^{2} +1 when m belongs to \sqrt{7} and \sqrt{10} the value of m lies between 2 and 4 and the value of m square +1 lies between 3 and 5. Hence the value of function at m square plus one is 9.

Learn more about functions at brainly.com/question/10439235

#SPJ10

6 0
2 years ago
If a = 5, b = 5 and c = 10, what is the value of ac / 2b ?
Sophie [7]

Answer:

The answer is 5 .

Step-by-step explanation:

You have to substitute the values of a, b and c into the expression :

\frac{ac}{2b}

Let a = 5,

Let b = 5,

Let c = 10,

\frac{5 \times 10}{2 \times 5}

=  \frac{50}{10}

= 5

3 0
4 years ago
If r=10 and s=31, find R. Round to the nearest tenth.
mars1129 [50]

Answer:

C. R = 17.9 degrees

Step-by-step explanation:

We have a rectangle triangle with the adjacent side and the opposite side (neither of which are the hypotenuse).

The relation between those elements is the tangent:

tan(angle) = \frac{Opposite side}{Adjacent side}

So, to isolate the angle, we modify the formula as such:

angle = arctan(\frac{Opposite side}{Adjacent side}) = arctan(\frac{10}{31}) = arctan(0.3225) = 17.87

If we round 17.87 degrees to the tenth... we get 17.9 degrees.

5 0
3 years ago
Read 2 more answers
Please help due in 10 min.
sleet_krkn [62]

Answer:

A: equiangular   S: Right

Step-by-step explanation:

5 0
3 years ago
How do I work out -5(-8)
slava [35]
You have to simplify like this (-5)(-8)=40
5 0
3 years ago
Read 2 more answers
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