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| The observations gathered on the characteristics of interest. |
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| existing archived collections of data. |
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| Consists of a body of methods for obtaining and analyzing data. ( obtain and analyze) |
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| Planning how to gather data for research studies. ( B/c you must always have a design/plan on how you will gather things) |
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| Summarizing the data. (Describe/summarize what was found) |
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| Making predictions based on the data. (m Infer; Pull whatever you can from the data.) |
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| Graphs, tables, and numerical summaries are called ? |
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| Descriptive Statistics ( b/c they are a form of describing/summarizing the data) . |
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| Predictions made using data are called ? |
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| What are the two types of statistical analysis - ways of analyzing the data ? |
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| Description and Inference. (Descriptive Stats and Inferential Stats.) |
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| A statistical analysis is classified as descriptive or inferential , according to what ? |
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| According to whether its main purpose is to describe the data , or make predictions. |
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| The entities that a study observes are called the ___ for the study ? |
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| the total set of subjects of interest in a study. |
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| the subset of the population on which the study collects data. |
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| For instance , let's say that we want to study the weekly diets of African-American families in the U.s. ? what would be the population ? Subset ? |
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Population: ALL African-American families in the U.S.
Subset: The 40 ( or the # you choose) African-American families in the U.S. |
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| The ultimate goal of any study is to do what ? |
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| what is the main purpose of descriptive statistics ? |
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| To reduce the data to simpler and more understandable forms without distorting or losing much information. ( just like a summary). |
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| What type of statistics apply when data are available only for a sample but we want to make a prediction about the entire population ? |
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| what provides predictions about a population , based on data from a sample of that population ? |
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| Inferential Statistics ( take a sample, then make a prediction about the whole population) |
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| A numerical summary of the population. |
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| A numerical summary of the sample data. |
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| The parameter is based on the population as a ...? |
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| A statistic always makes inferences about the ? |
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| Any number that describes the characteristics of a sample is a..? |
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