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The numbers in a data set have a mean (arithmetic average)
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16 Jan 2019, 17:42
16 Jan 2019, 17:42
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79% (00:26) correct
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The numbers in a data set have a mean (arithmetic average) of 0.
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
Number of data elements below the mean |
Number of data elements above the mean |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
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Re: The numbers in a data set have a mean (arithmetic average)
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21 Jan 2019, 14:09
21 Jan 2019, 14:09
1
Carcass wrote:
The numbers in a data set have a mean (arithmetic average) of 0.
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
Number of data elements below the mean |
Number of data elements above the mean |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Let's test some possible cases
case i: the set is {0, 0, 0}
The mean = 0
There are 0 numbers BELOW the mean
There are 0 numbers ABOVE the mean
So, we get:
QUANTITY A: 0
QUANTITY B: 0
In this case, the two quantities are equal
case ii: the set is {-2, 1, 1}
The mean = 0
There is 1 number BELOW the mean
There are 2 numbers ABOVE the mean
So, we get:
QUANTITY A: 1
QUANTITY B: 2
In this case, Quantity A is greater
Answer: D
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Re: The numbers in a data set have a mean (arithmetic average)
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29 Jan 2019, 19:19
29 Jan 2019, 19:19
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how could you determine the level of questions?
