17.6: Statistical Literacy

Introductory Statistics · LibreTexts

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    From LibreTexts, under Public Domain, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Learning Objectives

    • A Spice Inhibits Liver Cancer

    An experiment was conducted to test whether the spice saffron can inhibit liver cancer. Two groups of rats were tested. Both groups were injected with chemicals known to increase the chance of liver cancer. The experimental group was fed saffron (\(n = 24\)) whereas the control group was not (\(n = 8\)). The experiment is described here.

    Only \(4\) of the \(24\) subjects in the saffron group developed cancer as compared to \(6\) of the \(8\) subjects in the control group.

    Example \(\PageIndex{1}\): what do you think?

    What method could be used to test whether this difference between the experimental and control groups is statistically significant? Use Analysis Lab to do the test.

    Solution

    The Chi Square test of contingency tables could be used. It yields a \(\chi ^2\) (\(df = 1\)) of \(9.50\) which has an associated \(p\) of \(0.002\).

    This page titled 17.6: Statistical Literacy was last modified on Sat, 23 Apr 2022 18:23:25 GMT and is shared under a Public Domain license and was authored, remixed, and/or curated by David Lane via source content that was edited to the style and standards of the LibreTexts platform.