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Statistics Terms

1) What is the variance-measures how different scores are from each other

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S2= E(X-X)2
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2) What is the equation for standard deviation-square root of variance (more meaningful because it puts variability measure in the same units as original data)

S=(SQUARE ROOT) E(X-X)2
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3) How can statistics be used in psychology?

Solution Preview

Please see the attached file.

Case 16-1 Ingrid's Hallmark Shop II

Ingrid's Hallmark Shop is a retail store specializing in "social expression" products, such as greeting cards, stationery, albums, and party goods. The social expression industry is noted for its seasonal volatility- an average December day out selling an average August day by 10 to 1.

Christmas merchandise must be ordered many months in advance. It is impossible to reorder most items once the selling season begins. Consider Ingrid's decision regarding how many angel ornaments to order. She believes that there is equally likely demand for any quantity between 16 and 25 items, inclusive. Her cost (including freight) is $5.50, and the ornaments retail for $10. Unsold angels will be disposed of during the half-off sale after Christmas.

Everyday merchandise ...

Solution Summary

This explains variance and standard deviation and provides applications of statistics in psychology. The solution is provided within an attached Word document.

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