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Montano1993 [528]
3 years ago
5

The police department of a city with a population of 250000 wants to know how many residents wear their seatbelts regularly. whi

ch sample size would make the study most reliable?
A. 2500
B. 250
C. 5
D. 25

Mathematics
2 answers:
Alex Ar [27]3 years ago
4 0
A 2500 you want the biggest sample size possible for more accurate results
Tanzania [10]3 years ago
3 0

Answer:

Option A is correct.

Step-by-step explanation:

Given:

Population of the city is 250,000

Police department wants to know how many residents wear their seat belts regularly.

To find: Sample size for the study which make it most reliable.

Most reliable study means study which produce most accurate result.

We know that a study can produce most accurate result only when the sample size if as possible large.

So, among given options Only Possible Sample Size is 2500

Therefore, Option A is correct.

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Why is the power in the united states dived between several branches
Bingel [31]

Answer:

To ensure that they all have the equal amount of power; to make sure one branch doesn't have more power than the others.

6 0
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How to solve linear and nonlinear equations graphically?
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Plot the equation. If you wish to solve a polynomial, let y= polynomial and plot the graph. Best set up a table of values first.
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8 0
3 years ago
Identify all solutions for a triangle with A = 38 degrees b = 10, and a= 8. Round to the nearest tenth.
rjkz [21]

Answer:

A = 38°

B = 50.32°

C = 91.68°

a = 8

b = 10

c = 12.77

Step-by-step explanation:

The first thing is to find the angle B, like this:

sin B = b * sin A / a = 10 * sin (38 °) / 8

sin B = 0.77

B = arc sin (0.77)

B = 50.32 °

For angle C, it would be:

C = 180 - 38 - 50.32

C = 91.68 °

Side c, we calculate it like this:

c = a * sin C / sin A = 8 * sin (91.68 °) / sin (38 °)

c = 12.77

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How are you supposed solve x
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1. cot x sec4x = cot x + 2 tan x + tan3x
Mars2501 [29]
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                   0 = cos⁴(x)[1 + 2tan²(x) + tan⁴(x)]
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                 90 = x           or            √-1 = √tan²(x)
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2. sin(x)[tan(x)cos(x) - cot(x)cos(x)] = 1 - 2cos²(x)
              sin(x)[sin(x) - cos(x)cot(x)] = 1 - cos²(x) - cos²(x)
   sin(x)[sin(x)] - sin(x)[cos(x)cot(x)] = sin²(x) - cos²(x)
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3. 1 + sec²(x)sin²(x) = sec²(x)
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4. -tan²(x) + sec²(x) = 1
               -1               -1
      tan²(x) - sec²(x) = -1
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            tan⁻¹(tan(x)) = tan⁻¹(√(-1 + sec²(x))
                             x = 0
5 0
3 years ago
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