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atroni [7]
3 years ago
15

dentify which of these types of sampling is​ used: random,​ systematic, convenience,​ stratified, or cluster. To determine her a

ir qualityair quality​, MirandaMiranda divides up her day into three​ parts: morning,​ afternoon, and evening. She then measures her air qualityair quality at 33 randomly selected times during each part of the day. What type of sampling is​ used?
Mathematics
1 answer:
Bess [88]3 years ago
6 0

Answer:

The sampling method used is a stratified sampling method

Step-by-step explanation:

sampling is the selection of a predetermined representative subpopulation from a larger population, to estimate the characteristics of the whole population.

Stratified sampling: Here, the total population are divided into subcategories (strata) before sampling is done. The strata are formed based on some common characteristics. In our example, the times of the day (morning, afternoon and evening) has widely varying atmospheric conditions which will add biases to the measurement of air quality. For example, the air in the morning if compared to the afternoon in an industrial area may be purer because of minimal industrial activity, hence effective comparison will be made by stratification.

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1/2(x + 1)²- 3
Ierofanga [76]

Answer:

  • a = 1/2
  • h = -1
  • k = -3

Step-by-step explanation:

We assume you want to compare your expression to the form ...

  a(x -h)² +k

  1/2(x +1)² +k

The multiplier outside parentheses is ...

  a = 1/2

The horizontal offset inside parentheses is ...

  -h = 1

  h = -1

The vertical offset outside parentheses is ...

  k = -3

4 0
2 years ago
Determine the slope intercept form of the equation of the line parrell to y=-4/3x+11
olasank [31]
M = -4/3 (slope stays the same)
so y= -4/3x + b
b = y intercept
without a point on the line I can’t figure out what exact line you were looking for but that equation with any value as b will give you a line parallel to the original.
7 0
3 years ago
y : (<img src="https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B18%5C%5C%7D" id="TexFormula1" title="\frac{3}{18\\}" alt="\frac{3}{18\\}
poizon [28]

Answer:

whats the given?? what you need I don't understand

5 0
2 years ago
Read 2 more answers
What is the value of a in the equation 3+b=54 when b = 9
Fed [463]

Answer:

3a + b = 54

3a + 9 = 54

3a = 54 - 9

3a = 45

3a / 3 = 45 / 3

a = 15

5 0
3 years ago
INSCRIBED ANGLES PLZ HELP ASAP
Taya2010 [7]
The answer is 46°.

The measure of an inscribed angle is equal to (1/2) the measure of the intercepted arc. 

That means that, since ADC is 23 degrees, doubling that gives you 46 degrees, the measure of the intercepted arc.

Central angles are equal to the measure of the intercepted arc, which in this case is the same arc we just calculated.

Therefore it's 46.
4 0
2 years ago
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