Biostatistics — Flashcards

Flashcard 21: IDD(iodine def. disorder) survey is done using _____ sampling method

Answer: cluster

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Flashcard 22: 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.

Flashcard 23: 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 24: cut off for z score is _____

Answer: 2 SD(standard deviate)

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Flashcard 25: global annual growth rate is _____%

Answer: 1.07

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Flashcard 26: mid year population is calculated on _____

Answer: 1st july

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Flashcard 27: standard deviation =3 mean =18 coefficient of variation=_____%

Answer: 16.67

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Flashcard 28: Mean for Ungrouped series, when x = observations given n = total number of observations given _____

Answer: \(\bar{x} = \frac{\sum x}{n}\)

Flashcard 29: yield of a test corresponds to _____

Answer: PPV

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Flashcard 30: 5ce54378cee641398d486f0bc8c03a91-ao-2

Answer: false negative error rate

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