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For an entire class of students, the mean score on a test was 60, and 11 Mar 2020, 04:16
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84% (00:44) correct 16% (01:10) wrong based on 179 sessions

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For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
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B
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For an entire class of students, the mean score on a test was 60, and 11 Mar 2020, 06:33
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Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
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Mean = 60
SD = 15

M-2SD ≤ Elke's score ≤ M+2SD

60-30 ≤ Elke's score ≤ 60+30

30 ≤ Elke's score ≤ 90

Answer: Option B
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For an entire class of students, the mean score on a test was 60, and 11 Mar 2020, 08:27
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Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
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60 - 2*15 = 30 , Answer must be (B)
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For an entire class of students, the mean score on a test was 60, and 14 Mar 2020, 10:03
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Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
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The lowest score Eike could have received was 60 - 2 x 15 = 60 - 30 = 30.

Answer: B
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For an entire class of students, the mean score on a test was 60, and 14 Mar 2020, 10:19
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Bunuel
For an entire class of students, the mean score on a test was 60, and the standard deviation was 15. If Eike’s score was within 2 standard deviations of the mean, what is the lowest score Eike could have received?

A. 15
B. 30
C. 45
D. 60
E. 90
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Lowest score = Mean - 2* standard deviation = 60 - 2*15 = 30

IMO B
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For an entire class of students, the mean score on a test was 60, and 23 Oct 2023, 11:42
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