Type I and Type II errors — Flashcards

Flashcard 1: The probability of making a type 2 error is represented by _____

Answer: beta

Flashcard 2: The probability of making a type 1 error is represented by _____

Answer: alpha

Flashcard 3: Increased precision is associated with _____ statistical power (1 - β)

Answer: increased

Flashcard 4: What type of error is stating that there is NO effect when one DOES exists?_____

Answer: Type II (false-negative error)

Flashcard 5: What statistical test is used to check differences between the means of TWO groups? _____

Answer: t-test

Flashcard 6: What is the t-test used for? (biostatistics)

Answer: Compare means of two groups. mnemonic: Mr. T is mean.

Flashcard 7: "β" with reference to statistical error

Answer: the probability of making a Type II statistical (false negative) error

Flashcard 8: power (epidemiology)

Answer: probability of detecting a differential effect if it is actually present

Extra: power = (1-β)

Flashcard 9: What is the relationship between standard error of the mean and standard deviation?

Answer: SEM = SD / √n (Standard Error of the Mean = Standard Deviation / √Sample size)

Flashcard 10: In a normal distribution, how many data points fall within three standard deviations from the mean?

Answer: 99.7%