3. Describing Data Numerically

Interpreting Standard Deviation

객관식
In introductory statistics, standard deviation is commonly used as a measure of which type of risk or variability in a set of outcomes?
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객관식
In the context of a dataset, what does it mean if the standard deviation is high?
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객관식
In the context of a dataset, what does a high standard deviation indicate about the data values?
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객관식
In statistics, the standard deviation of a set of returns measures which type of risk?
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객관식
In a normal distribution, approximately what percentage of observations lie within one standard deviation of the mean (i.e., between $μ - σ$ and $μ + σ$ )?
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객관식
A sample of 500 random adult books in a library has an average of 312 pages with a standard deviation of 26 pages. Find the percentage of books in the sample with less than 338 pages using the Empirical Rule of Standard Deviation.
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객관식
The average birth weight at a hospital is 6.5lbs. with a standard deviation of 1.4lbs. What is the lowest weight which would be considered significantly high? Hint: Range Rule of Thumb - Numbers which are 2 or more standard deviations away from the mean are considered "significant".
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객관식
A sample of 500 random adult books in a library has an average of 312 pages with a standard deviation of 26 pages. According to the Empirical Rule of Standard Deviation, find the central range of page lengths containing 95% of the books in the sample.
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