Review ArticleContinuing Education

Statistics Refresher for Molecular Imaging Technologists, Part 2: Accuracy of Interpretation, Significance, and Variance

Mary Beth Farrell
Journal of Nuclear Medicine Technology June 2018, 46 (2) 76-80; DOI: https://doi.org/10.2967/jnmt.117.204719

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Figures

  • FIGURE 1.
    FIGURE 1.

    Demonstration of significant P values. Study evaluated tracer uptake in stomach during myocardial perfusion imaging when hamburgers were cooked nearby (7). Significant difference (significant P value) between women and men was found for stomach counts but not heart counts.

  • FIGURE 2.
    FIGURE 2.

    Graphs demonstrating variation in data for 2 samples although weight range (100–250 lb) and mean weight (175 lb) were the same for both populations: bell-shaped curve (A) and bimodal (2-peak) distribution (B).

  • FIGURE 3.
    FIGURE 3.

    Normal bell-shaped distribution of data. Peak of curve is mean (purple line). One SD below and above mean (green lines) represents 68% of data, 2 SDs below and above mean (orange lines) represent 95% of data, and 3 SDs below and above mean (red lines) represent 99.7% of data.

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