Statistic Help: The quantitative portion of a nationally administered achievement test is scaled

Описание к видео Statistic Help: The quantitative portion of a nationally administered achievement test is scaled

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Full question:
The quantitative portion of a nationally administered achievement test is scaled so that the mean score is 500 and the standard deviation is 100
a) If we assume that the distribution of scores is normal, what percentage of the students throughout the country should score between 500 and 682?

b) What percentage should score between 340 and 682?


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