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Questions and Answers
What does statistics deal with?
What does statistics deal with?
- Collection and organization of data only
- Collection, organization, analysis, and interpretation of data (correct)
- None of the above
- Analysis and interpretation of data only
What are some applications of statistics?
What are some applications of statistics?
- Business and education only
- Business, education, psychology, politics, medicine, agriculture, entertainment, and everyday life (correct)
- None of the above
- Psychology and politics only
What is the aim of descriptive statistics?
What is the aim of descriptive statistics?
- To represent count data through discrete random variables
- None of the above
- To draw inferences about a population based on information obtained from a sample
- To provide basic characteristics of a data set through tables, graphs, and measures of central tendency, position, and variation (correct)
What does inferential statistics do?
What does inferential statistics do?
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What is the difference between population and sample?
What is the difference between population and sample?
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What is the difference between qualitative and quantitative data?
What is the difference between qualitative and quantitative data?
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What are the types of variables?
What are the types of variables?
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What is probability?
What is probability?
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What are random variables?
What are random variables?
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What do discrete random variables represent?
What do discrete random variables represent?
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Study Notes
- Statistics deals with collection, organization, analysis, and interpretation of data.
- Applications of statistics include business, education, psychology, politics, medicine, agriculture, entertainment, and everyday life.
- Descriptive statistics aims to provide basic characteristics of a data set through tables, graphs, and measures of central tendency, position, and variation.
- Inferential statistics draws inferences about a population based on information obtained from a sample.
- Population refers to a large collection, while a sample is a small portion of a population.
- Qualitative data are categorical, while quantitative data are numerical.
- Variables can be discrete or continuous, dependent or independent.
- Probability is the mathematics of chance and experiments include tossing a coin, rolling a die, etc.
- Random variables are functions that associate a real number to each element in the sample space.
- Discrete random variables represent count data, while continuous random variables represent measured data.
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