biometrics quiz 1

Parameters

Constants that describe the population as a whole

Statistics

a quantitative characteristic that describes a sample obtained from a population.

Mode

most frequently appearing value or class of values in a set of observations.

Median

the middle value of the series of observations when they have been arranged in order of magnitude

Mean

the arithmetic average of the set of observations.

Range

the difference between the high-est and the lowest value recorded.

Quartile

a value that divides a set of data into four equal parts

Standard deviation

a measure of how spread out a set of data is from its mean

Variation

how spread out the data is around the center of the data.

coefficient of

variation (CV)

The ratio of the standard deviation to the mean

standard error of the mean

regarded as a standard deviation among the means of samples of a fixed size n. Used for confidence limits

95% confidence interval

if you were to repeat an experiment many times, you can be 95% confident that the true population parameter (like the mean) would fall within the calculated range of values defined by the upper and lower bounds of the interval

central limit theorem

the distribution of sample means approaches a normal distribution as the sample size increases.

Accuracy

the success of estimating the true value of a quantity

Precision

clustering of sample values around their own average.