Write the word form of $52.45 as it would appear on a check. (4-2)

Lecture 3: Sampling: Surveys and How to Ask Questions 5.1 Collecting and Using Sample Data Wisely Definitions: -­ Descriptive Statistics: Describing data using numerical summaries (such as the mean, IQR, etc.) and graphical summaries (such as histograms, bar charts, etc.). -­ Inferential Statistics: Using sample information to make conclusions about a larger group of items/individuals than just those in the sample. -­ Population: The entire group of items/individuals that we want information about, about which inferences are to be made. -­ Sample: The smaller group, the part of the population we actually examine in order to gather information. -­ Variable: The characteristic of the items or individuals that we want to learn about. Fundamental Rule for Using Data for Inference: -­ Available data can be used to make inferences about a much larger group if the data can be considered to be representative with regard to the question(s) of interest. Sample vs Census survey - Many times we cannot sample the whole population, so we have to sample certain people and gauge the percentage of the entire population who have a certain trait or opinion to within 3%. - The key is to