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frutty [35]
2 years ago
5

To find how high school students feel about hot lunches, adam walks to the nearest high school and gives a survey postcard to ev

ery twentieth student that enters the building. he asks the students to mail the postcard in if they choose to participate in the study. select all sampling methods used.
SAT
1 answer:
ratelena [41]2 years ago
8 0

All the sampling methods used in the given survey are; convenience, systematic, and voluntary sampling.

<h3>What is the sampling method used?</h3>

From the question, we see that the surveyor selects the twentieth student who enters the building.

Now, the student do not enter the building to be surveyed but instead for other reasons and as such the researcher takes advantage of that and selects them. This is a form of convenience sampling.

It is also a form of systematic sampling because the researcher selects every twentieth student and not any other.

Lastly, it is a form of Voluntary sampling because the students selected to participate in the survey are free to choose whether to participate in the survey or not.

Read more about Sampling Methods at; brainly.com/question/9910540

#SPJ1

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Barb tests the properties of three minerals and makes a data table to record her results, as shown below.
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Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. A scratch test developed by a German mineralogist Friedrich Mohs in 1822 is used to determine mineral hardness.

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A sample of a compound that contains only the elements c, h, and n is completely burned in o2 to produce 44. 0 g of co2, 45. 0 g
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Answer:

B. CH₅N

Explanation:

The combustion reaction of a compound CₐHₓNₙ with O₂ is:

CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂

Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂

Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:

Moles CO₂ (Molar mass 44g/mol):

44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C

Mole of H₂O (Molar mass 18g/mol):

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3 years ago
Which would best help an athlete be successful in strategy training?
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Time of training should be for approx. 45-60 minutes to improve fitness.

To overcome the failures and to achieve goals, it is essential to have a person compelling vision. A lot of athletes achieve success after failures due to their vision. They have a dream which motivates them to perform better.

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A person who is expert in sports and other forms of physical exercise.

Athlete should  set goals which is considered to be the first step in the process of achieving success.  Goals keep successful athletes motivated in the ground while playing.

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brainly.com/question/3524635

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Villa of Green Happiness.

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