Marshall Hargrave is a stock analyst and writer with 10+ years of experience covering stocks and markets, as well as analyzing and valuing companies. Dr. JeFreda R. Brown is a financial consultant, ...

Most people have decades of experience looking at graphs. We see them in television reports, books, magazines, presentations at work, and on the stock market apps on our phones. On the surface, ...

Brian Beers is a digital editor, writer, Emmy-nominated producer, and content expert with 15+ years of experience writing about corporate finance & accounting, fundamental analysis, and investing.

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In response to my article, Is the Stock Market Too Concentrated?, which relied upon standard-deviation calculations to assess investment risk, a reader wrote: “My problem [with your argument] is ...

This interval corresponds to 1.96 times the standard deviation and tells us that 95 out of 100 observations sampled from this population should fall within the upper and lower bounds.