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The earthworms in sample A have an average length of 2.4 inc
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30 Jul 2018, 09:18
30 Jul 2018, 09:18
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74% (01:02) correct
25% (00:52) wrong based on 63 sessions
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The earthworms in sample A have an average length of 2.4 inches, and the earthworms in sample B have an average length of 3.8 inches. The average length of the earthworms in the combined samples is 3.0 inches. Which of the following must be true?
Indicate all such statements.
A. There are more earthworms in sample A than in sample B.
B. The median length of the earthworms is 3.2 inches.
C. The range of lengths of the earthworms is 1.4.
Indicate all such statements.
A. There are more earthworms in sample A than in sample B.
B. The median length of the earthworms is 3.2 inches.
C. The range of lengths of the earthworms is 1.4.
Re: The earthworms in sample A have an average length of 2.4 inc
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11 Aug 2018, 14:11
11 Aug 2018, 14:11
2
We know that the average length of earthworms is closer to the average length of sample A than sample B, so the number of earthworms in sample A must be greater.
We know nothing about the median of the earthworms.
We know nothing about the range of the length of earthworms, as we know nothing about the minimum or maximum lengths of the earthworms.
The answer is A.
We know nothing about the median of the earthworms.
We know nothing about the range of the length of earthworms, as we know nothing about the minimum or maximum lengths of the earthworms.
The answer is A.
Re: The earthworms in sample A have an average length of 2.4 inc
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30 May 2021, 21:03
30 May 2021, 21:03
GreenlightTestPrep
Hi sir,
Can you please throw some more light on why option A is correct?
Is it always true for the average of two different sets that whichever set's average the total average is closer to will have greater number of elements?
Hi sir,
Can you please throw some more light on why option A is correct?
Is it always true for the average of two different sets that whichever set's average the total average is closer to will have greater number of elements?
