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Algebra 2 Name: Date: 1. What is the science of statistics? The science of statistics deals with the collection, analysis, interpretation, and presentation of data. 2. Describe descriptive statistics? Organizing and summarizing data is called descriptive data. 3. What are the two ways to summarize data? Two ways to summarize data are by graphing and numbers. 4. What is inferential statistics? Inferential statistics are formal methods of analyzing or drawing conclusions on data. 5. Define Probability and state what it deals with. Probability is a mathematical tool used to study randomness. 6. What is a population in statistics? In statistics population is an entire collection of persons, things, or objects under study. 7. What is a sample in statistics? A sample in statistics is to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population 8. What is a statistic? 9. What is a parameter? 10. What makes a sample a representative sample? 11. Define variable and describe the two types of variables. 12. What is data and what is the singular for data? 13. Define Qualitative Data. 14. Define Quantitative Data and describe the types of quantitative data. 15. Why would you only use a sample of your population? 16. What is the most important method to insure that your sample is representative of your population? 17. Describe the different methods of random sampling. 18. What are the factors that cause sampling errors and nonsampling errors? 19. What is sampling bias and what causes it? 20. How should we round off answers in statistics? 21. Do we need to reduce fractions in statistics? 22. Describe frequency, relative frequency, and cumulative relative frequency.