Biostatistics — Flashcards

Flashcard 11: non-parametric test of significance is done for _____ and _____ data

Answer: qualitative

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Flashcard 12: harmonic mean is calculated in cases of _____

Answer: inverse data and fractional values

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Flashcard 13: c65872b736324b578b20a22eef5c027a-ao-5

Answer: tests of significance

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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: Standard Error (SE) is the _____.

Answer: standard deviation of the sampling distribution of the mean

Extra: Standard Error (SE) = SD / √n Standard Error represents the standard deviation of the sampling distribution of the mean. It indicates how much the sample mean is expected to vary from the true population mean.

Flashcard 17: _____ is a joined column graph used for representing quantitative data.

Answer: Histogram

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: Sample size for quantitative data when SD of population is known and allowable error L is given: _____

Answer: \(n = \frac{4SD^2}{L^2}\)

Extra: The formula for sample size for estimating a population mean with a 95% confidence level (where Z ≈ 1.96 ≈ 2) is n = (Z² * σ²) / L². Substituting Z=2 gives n = 4σ²/L².