As the degrees of freedom increase, the t distribution approaches the _____ distribution.

A probability distribution for all possible values of a sample statistic is known as a _____.

A ____________ variable can have values that are numbers on the real number line.

A contingency table would be used to summarize data such as ________.

Both qualitative and quantitative data can be displayed using a _____ graph.

The ___ can be used to show the rank order and shape of a data set simultaneously.

Cumulative frequency is the frequency distribution where the distribution of scores is progressively represented by the _____

Bimodal distribution is a frequency distribution that has distinct twin peaks that do not need to be the exact same height.

Bar graph is a graph that often represents nominal data in_____

A good theory should _____

A stratified sample is a sample in which people or objects are included in the sample in varying proportion to their frequency in the subgroups that make up the population.