Samples
a sample by dividing the population into clusters and selecting a few whole clusters as samples.
Cluster Sample
information coming from observations, counts, measurements, or responses.
Data
situations that can be reduced into two outcomes
Binomial Distributions
(for normal distribution) Approximately 68% of the data falls within 1 standard deviation of the mean.
Empirical Rule
the branch of statistics that involves the organization, summarization, and display of data.
Descriptive Statistics
a sample selected based on whatever is convenient for the researcher.
Convenience Sample
an action, or trial, through which specific results (counts, measures, responses) are obtained.
Event
the set of the outcomes in a sample space that are not included in the outcomes of the event.
Complement of An Event
If samples of size n (where n is greater than or equal to 30) are drawn from any population (with µ and σ), the the sampling distribution of sample means approximates a normal distribution.
Central Limit Theorem
A relationship between two variables
Correlation
selects by dividing the population up into groups by some characteristic that is important to the study, then sample from each group.
Stratified Sample
the amount of times a value appears in the data set
Frequency
a range of numbers that gives reasonable values for a parameter.
Confidence interval
the organization of raw data in table form using classes and frequency.
Frequency Distribution
selecting every kth subject of the group.
Systematic Sample
a statement about a population parameter.
Hypothesis
sum of the frequency of a class and all other previous classes.
Cumulative Frequency
the five specific values used to construct a boxplot. The numbers are listed from least to greatest.
Five Number Summary
the group not being manipulated in an experimental study.
Control Group
probability that relies on actual experience to determine the likelihood of outcomes.
Experimental Probability