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P = {3, 2, 1} Q = {1, 2, 3} R = {3, 2, 1, 1, 2, 3} If s1 , s2 ,
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25 Sep 2024, 22:47
25 Sep 2024, 22:47
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66% (01:15) correct
33% (01:44) wrong based on 12 sessions
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\(P = {–3, –2, –1}\)
\(Q = {1, 2, 3}\)
\(R = {–3, –2, –1, 1, 2, 3}\)
If \(s_1, s_2, s_3\) are the standard deviations of sets P, Q and R respectively, which of the following must be true?
I. \(s_1< s_2\)
II. \(s_1=0\)
III. \(s_3=0\)
A. I only
B. I and II
C. II and III
D. I and III
E. None
\(Q = {1, 2, 3}\)
\(R = {–3, –2, –1, 1, 2, 3}\)
If \(s_1, s_2, s_3\) are the standard deviations of sets P, Q and R respectively, which of the following must be true?
I. \(s_1< s_2\)
II. \(s_1=0\)
III. \(s_3=0\)
A. I only
B. I and II
C. II and III
D. I and III
E. None
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Re: P = {3, 2, 1} Q = {1, 2, 3} R = {3, 2, 1, 1, 2, 3} If s1 , s2 ,
[#permalink]
26 Sep 2024, 02:31
26 Sep 2024, 02:31
2
Standard deviation is the spread around the mean.
Without calculating we see that s1 = s2 and s1, s2, s3 > 0.
Therefore, none of the answers is true => E
Without calculating we see that s1 = s2 and s1, s2, s3 > 0.
Therefore, none of the answers is true => E
gmatclubot
Re: P = {3, 2, 1} Q = {1, 2, 3} R = {3, 2, 1, 1, 2, 3} If s1 , s2 , [#permalink]
26 Sep 2024, 02:31
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