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STAT 250 Chapter 1
| Term | Definition |
|---|---|
| What is the definition of Statistics? | Statistics is the science of collecting, describing, and analyzing data |
| The science of Statistics consists of? | Data and learning from data Collecting organizing, presenting, summarizing, and analyzing information from data to make inferential conclusions, answer questions and gain understanding Doing all these things in the face of variation and uncertainty |
| What is the first step in the Order of Operations for Statistics | Ask a research questions (leading to) |
| What does Statistics allow us to do? | Learn about the world around us Check our beliefs against evidence Communicate what we’ve learned to others |
| True or False; Statistics data must be accurate and appropriate for? | True |
| What is the second step in the Order of Operations for Statistics? | Design a study and collect data |
| What is the third step in the Order of Operations for Statistics? | Organize and summarize the data |
| What is the fourth step in the Order of Operations for Statistics? | Visually explore the data for patterns |
| What is the fifth step in the Order of Operations for Statistics? | Draw inferences and formulate conclusions |
| What is the sixth and last step in the Order of Operations for Statistics? | Communicate what we’ve learned to others |
| What is the definition of Data? | Data are observations gathered for analysis |
| What is an alternative definition of Data? | Data are also described as numbers with context or in numbers in context |
| True or False; Data must always be numerical? | False |
| A __ consists of values for one or more variables that record or measure information for each of the cases | Dataset |
| ___ are the subjects/objects that we obtain information about (aka. subjects , units, or individuals) | Cases |
| Where is the information for each case recorded in a data table | In each row |
| ___ Are any characteristics that are recorded for each case (aka features in machine learning) | Variable |
| Where is the information for Variables presented on a data table? | Columns |
| Consists of all individuals or objects of interests | Population |
| A group selected from the population, or a subset of the population | Sample |
| Attempts to gather data about every individual in a population | Census |
| Which variable represents population | N |
| What variable represents Sample | n |
| The process of using data from a sample to gain information about the population | Statistical Inference |
| An assumption that the population contains some fixed truth | Parameter |
| When individuals or groups in the population are left out of the process of choosing the sample | Undercoverage |
| Occurs when the method of selecting a sample causes the sample to differ from the population in some relevant way | Sampling Bias |
| A _______ describes exactly how to choose a sample from the population | Sample Design |
Created by:
wilkinsrydellr