Biostatistics — Flashcards

Flashcard 11: _____ is the probability that when the test is negative, the disease is absent

Answer: Negative predictive value

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Flashcard 12: c65872b736324b578b20a22eef5c027a-ao-5

Answer: tests of significance

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Flashcard 13: harmonic mean is calculated in cases of _____

Answer: inverse data and fractional values

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Flashcard 14: Formula for Mode for Grouped data, when, \(L = \) lower limit of modal class \(f_1 = \) _____ \(f_0 = frequency \ of \ class \ above\ modal\ class\) \(f_2 = frequency\ of \ class \ after \ modal \ class\) \(i = group \ interval\) is given by, _____

Answer: frequency of modal class

Flashcard 15: standard error proportions is calculated for _____ data

Answer: qualitative

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Flashcard 16: IDD(iodine def. disorder) survey is done using _____ sampling method

Answer: cluster

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Flashcard 17: Formula to calculate **Standard Deviation** in **Ungrouped data**:\n\nWhen:\n\\(\\bar{X}\\) = Mean\n\\(X - \\bar{X}\\) = Difference of each observation from mean\n\\(\\sum (X - \\bar{X})^2\\) = Sum of squares of mean deviations\n\nStandard formula:\n_____\)}} \n\nShortcut formula:\n_____{n-1}}\)}}

Answer: \(SD = \sqrt{\frac{\sum (X - \bar{X})^2}{n-1

Flashcard 18: formula for specificity

Answer: True Negatives / (True Negatives + False Positives) (d / (b + d) in a 2x2 table)

Extra: Specificity is the true negative rate, representing the proportion of people without the disease who test negative.

Flashcard 19: Most commonly used sampling method in health surveys is _____

Answer: cluster sampling

Flashcard 20: _____ is a joined column graph used for representing quantitative data.

Answer: Histogram