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USPshnik [31]
3 years ago
7

To select a sample of five children from a class of 30, a researcher puts each child’s name on a slip of paper, then shuffles th

e papers in a hat and randomly picks five names. What kind of sampling is being used?
Mathematics
1 answer:
Ainat [17]3 years ago
7 0

Answer:

We conclude that  a researcher  used simple random sample.

Step-by-step explanation:

We know that select a sample of five children from a class of 30, a researcher puts each child’s name on a slip of paper, then shuffles the papers in a hat and randomly picks five names.  

We conclude that  a researcher  used simple random sample.

Because every children  has an equal chance of being included in the sample.

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What are the coordinates of the point on the directed line segment from (-4, - 7) to
lara [203]

Answer:

The coordinates of the point on the directed line segment from (-4, - 7) to

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\therefore P(x,y)=(\frac{-18}{5},\frac{-19}{5})

or

∴ PointP( x , y ) = ( -3.6, -3.8)

Step-by-step explanation:

Let he points be,

point A( x₁ , y₁) ≡ ( -4 ,-7)

point B( x₂ , y₂) ≡ (-3 , 1)

and Point P( x , y ) be the point on the line Segment AB Divides AB internally in the ratio 2 : 3 i. e m : n

To Find:

Point P( x , y ) = ?

Solution:

IF a Point P divides Segment AB internally in the ratio m : n, then the Coordinates of Point P is given by Section Formula as

x=\frac{(mx_{2} +nx_{1}) }{(m+n)}\\ \\and\\\\y=\frac{(my_{2} +ny_{1}) }{(m+n)}\\\\

Substituting the Given values we get

x=\frac{(2(-3) +3(-4)) }{(2+3)}\\ \\and\\\\y=\frac{(2(1) +3(-7)) }{(2+3)}\\\\x=\frac{-18}{5}\\ \\and\\\\y=\frac{-19}{5}\\\\\therefore P(x,y)=(\frac{-18}{5},\frac{-19}{5})

∴ PointP( x , y ) = ( -3.6, -3.8)

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3 years ago
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