| A | B |
|---|
| interquartile range | difference of the third and first quartiles in a data set |
| margin of error | In a random sample |
| mean | the sum of all values in a data set divided by the number of data values. |
| median of a data set | for an ordered data set with an odd number of values |
| normal curve | A smooth symmetrical |
| Observational study | A study that observes individuals and or their environment in any way |
| population | the entire group of objects or individuals considered for a survey |
| probability distribution for an experiment | the function that pairs each outcome |
| random sample | a sample selected from a population so that each member of the population has an equal chance of being selected. |
| random variable | a variable whose value is determined by the outcomes of a random event. |
| randomized comparative experiment | an experiment in which individuals are assigned to control groupor the treatment group at random |
| sample | a part of the population |
| simulation | a model of an experiment |
| standard deviation | a measure of dispersion of a data set. |
| standard normal distribution | the normal distribution with mean 0 and standard deviation 1. |
| statistic | a number that describes a sample |
| z-score | the number z of a standard deviations that a data value lies above or below the mean of the data set. |
