Biostatistics — Flashcards

Flashcard 161: The confidence interval is smaller with a _____ sample size.

Answer: larger (larger/smaller)

Flashcard 162: Statistical power of a test is calculated as _____

Answer: 1-(Type II error)

Flashcard 163: Which of the following can be constructed directly using the bars of a histogram: a frequency polygon or an ogive?

Answer: Frequency polygon (by joining the mid-points of the bars)

Flashcard 164: Calculating Mode (using mean and median) = _____

Answer: 3 Median - 2 Mean

Flashcard 165: What type of distribution is characterized by a tail extending towards the right side, where the Mean > Median > Mode?

Answer: Positively skewed (Right-skewed) distribution

Extra: In a positively skewed distribution: - Tail extends towards the right (positive side). - Mean > Median > Mode. Conversely, in a negatively skewed (left-skewed) distribution: - Tail extends towards the left (negative side). - Mean < Median < Mode.

Flashcard 166: _____ distribution is the probability distribution that describes the chances of an event in a particular time frame

Answer: Poissons

Flashcard 167: The horizontal line on either side of rectangles in the Forest plot represent _____

Answer: confidence intervals

Flashcard 168: Measurements on the celsius scale represent _____ scale data

Answer: interval

Flashcard 169: _____ is equal to the sum of Years of Life Lost (YLL) due to premature mortality and Years Lived with Disability (YLD).

Answer: Disability-Adjusted Life Year (DALY)

Flashcard 170: Calculating one variable using another variable is done using coefficient of _____

Answer: regression