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Pie
3 years ago
11

Which sampling method subdivides the population into categories sharing similar characteristics and then selects a sample from e

ach​ subdivision?
Choose the correct answer below.
a. Stratified
b. Convenience
c. Systematic
d. Cluster
Physics
1 answer:
V125BC [204]3 years ago
3 0

Answer:

d. Cluster

Explanation:

Cluster sampling is method of sampling in which samples re subdivided into categories sharing similar characteristics and then selects a sample from each​ subdivision. These groups are called clusters.

For equal sample sizes cluster sampling provide less precision than,simple random sampling and stratified sampling. On the other hand when travel costs between clusters are high, cluster sampling is more cost-effective than the other methods.

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Why forces are balanced and unbalanced? need help with this the lesson is tommorow
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"Balanced" means that if there's something pulling one way, then there's also
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-- If there's a tug-of-war going on, and there are 300 freshmen pulling on one
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-- If a lady in the supermarket is pushing her shopping cart up the aisle, and her
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toward her.  If the kids are strong enough, then the forces on the cart can be
balanced. Then the cart doesn't move at all, and it's just as if nobody is pushing
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From these examples, you can see a few things:

-- There's no such thing as "a balanced force" or "an unbalanced force".
It's a <em><u>group</u> of forces</em> that is either balanced or unbalanced.

-- The group of forces is balanced if their strengths and directions are
just right so that each force is canceled out by one or more of the others.

-- When the group of forces on an object is balanced, then the effect on the
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4 0
3 years ago
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Which of two factors influence the weight of an object due to gravitational pull?
Maslowich
Where are the factors ... to this question

5 0
3 years ago
A transverse wave has a frequency of 200 Hz with a wavelength of 1.0 m. Determine the speed
Lana71 [14]

Answer:

200 m\ s Ans .....

Explanation:

Data:

f = 200 Hz

w = 1.0 m

v = ?

Formula:

v = f w

Solution:

v = ( 200)(1.0)

v = 200 m\s <em>A</em><em>n</em><em>s</em><em> </em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>

7 0
2 years ago
What is electrical conductivity?
Luda [366]

Answer:

Electrical resistivity and its inverse, electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter ρ.

5 0
3 years ago
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Two air craft P and Q are flying at the same speed 300m/s. The direction along which P is flying is at right angles to the direc
Lerok [7]

Answer:

424.26 m/s

Explanation:

Given that Two air craft P and Q are flying at the same speed 300m/s. The direction along which P is flying is at right angles to the direction along which Q is flying. Find the magnitude of velocity of the air craft P relative to air craft Q

The relative speed will be calculated by using pythagorean theorem

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Relative speed = sqrt( 180000 )

Relative speed = 424.26 m/s

Therefore, the magnitude of velocity of the air craft P relative to air craft Q is 424.26 m/s

7 0
3 years ago
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