ITT Tech MA3110 Vocab 1 Essay Example for Free

ITT Tech MA3110 Vocab 1 EssayStatistics the science of planning studies and experiments, obtaining data, and then organizing, summarizing, presenting, analyzing, interpreting, and rough drawing conclusions based on the data. Population the collection of all elements to be studied. Census a collection of data from every member of the population exemplification a subset of members selected from a populationVocabulary 1 Chapter 1 Section 2Statistical Significance an arbitrary limit where an observed difference is reasonably assumed to be due to some factor other than pure chance. Practical significance an arbitrary limit where an observed difference is of some practical go for in the real world. Vocabulary 1 Chapter 1 Section 3Parameter a numeric measurement of a population characteristic. Statistic a numerical measurement of a sample characteristic. Quantitative information data that consists of numbers representing counts of measurements. Categorical Data data th at can be separated into different categories that be distinguished by some nonnumeric characteristic.Discrete Data data that has a finite number or countable number of possible values. Continuous Data data that has an infinite number of possible values, with no gaps in the possible values. Nominal direct of Measurement data that are qualitative only. Ordinal Level of Measurement data that can be ordered, but computational differences are meaningless. Interval Level of Measurement data that are ordinal level, and also having significant computational differences, but having no significant zero value.Ratio Level of Measurement data that are interval level, and also having meaningful computational differences, and having a significant zero value. Vocabulary 1 Chapter 1 Section 4Voluntary Response taste a style of have that incorporates non probability sampling methods in its research. Correlation the degree to which two or more attributes or measurements on the same gro up of elements show a tendency to vary together. author the principle that nothing can happen without being caused. Order of Questions sometimes survey questionsare unintentionally loaded by factors of the items being considered. Nonresponse occurs when someone any refuses to respond to a survey question or is unavailable. Missing Data occurs when no data value is stored for the variable in an observation. Vocabulary 1 Chapter 1 Section 5Observational Study observe and gather data without attempting to modify the subjects. Experiment apply some treatment and then observe the do of the treatment on the subjects. Simple Random Sample a sample of n subjects that is selected in a way that makes every possible sample of surface n is equally likely. Random Sample a sample in which each individual member of a population is equally likely to be chosen. Probability Sample a sample in which each individual member of a population has a known chance of being chosen. overbearing Sam ple a sample selected by choosing a starting point in the list of subjects and then selecting every kth subject from that point on. Convenience Sample a sample selected by choosing subjects that are most easily accessed. Stratified Sample a sample selected by dividing the population into at least two subgroups and then choosing subjects from each subgroup. Cluster Sample a sample selected by dividing the population into at least two subgroups, randomly selecting subgroups, and then choosing all subjects from the selected subgroups. Sampling Error error in a statistical analysis arising from the unrepresentativeness of the sample taken.