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Blizzard [7]
3 years ago
13

Mark wants to know how many families in his neighborhood plan to attend the neighborhood party. He puts all 80 of the neighborho

od addresses in a hat and draws a random sample of 20 addresses. He then asks those families if they plan to attend the party. He finds that 20% of the families plan to attend the party. He claims that 20% of the neighborhood families would be expected to attend the party. Is this a valid inference?
A. No, this is not a valid inference because he asked only 20 families
B. No, this is not a valid inference because he did not take a random sample of the neighborhood
C. Yes, this is a valid inference because he took a random sample of the neighborhood
D. Yes, this is a valid inference because the 20 families speak for the whole neighborhood
Mathematics
2 answers:
bonufazy [111]3 years ago
8 0

Answer:

A. No, this is not a valid inference because he asked only 20 families

Step-by-step explanation:

You cannot assume that those are the only families that would want to go; you have to ask all the families.

notka56 [123]3 years ago
7 0

Answer:

It is c

Step-by-step explanation:

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3 years ago
Triangle ABC is transformed to obtain triangle A′B′C′:
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Answer:

Option C is right.

Step-by-step explanation:

Given is a graph with two triangles marked on it.

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Triange A'B'C' is in the III quadrant with vertices (-1,-1), (-1,-5) and (-4,-6)

On comparison we find corresponding side of AB is A'B'

Length of AB = 8 and Length of A'B' = 4.

Hence A'B'C' is obtained by dilating ABC by a scale factor of 1/2.

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8 0
3 years ago
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dsp73

Answer:

81

Step-by-step explanation:

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{x}^{2}  + 18x +  {9}^{2}

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2 years ago
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natka813 [3]

Answer:

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Oliga [24]

Answer:

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Step-by-step explanation:

This is the exact form

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