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The average (arithmetic mean) of a normal distribution

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The average (arithmetic mean) of a normal distribution [#permalink] New post 15 Jul 2012, 16:36
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The average (arithmetic mean) of a normal distribution of a school's test scores is 65, and standard deviation of the distribution is 6.5. A student scoring a 78 on the exam is in what percentile of the school?

A) 63rd percentile
B) 68th percentile
C) 84th percentile
D) 96th percentile
E) 98th percentile
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Re: The average (arithmetic mean) of a normal distribution [#permalink] New post 15 Jul 2012, 16:39
Alterego wrote:
The average (arithmetic mean) of a normal distribution of a school's test scores is 65, and standard deviation of the distribution is 6.5. A student scoring a 78 on the exam is in what percentile of the school?

A) 63rd percentile
B) 68th percentile
C) 84th percentile
D) 96th percentile
E) 98th percentile



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Re: The average (arithmetic mean) of a normal distribution   [#permalink] 15 Jul 2012, 16:39
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