Wednesday, September 23 Descriptive v. Inferential statistics.

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Presentation transcript:

Wednesday, September 23 Descriptive v. Inferential statistics.

Population µ Sample X _ You describe the sample and then make inferences about the population. 2

Wednesday, September 23 Descriptive v. Inferential statistics. Independent v. Dependent variables.

Wednesday, September 23 Descriptive v. Inferential statistics. Independent v. Dependent variables. Types (scales) of data: nominal, ordinal, interval, ratio.

http://www. championchiptiming. com/images/files/static/368OverAllLong http://www.championchiptiming.com/images/files/static/368OverAllLong.htm

Wednesday, September 23 Descriptive v. Inferential statistics. Independent v. Dependent variables. Types (scales) of data: nominal, ordinal, interval, ratio. Frequency distributions. Stem-and-Leaf display.

Let's collect some data!

Let's collect some data! Estimate in inches

Let's collect some data! Estimate in inches Male or Female

Let's collect some data! Estimate in inches Male or Female Confidence in estimate w/in ½ inches Yes/No

Let's collect some data! Estimate in inches Male or Female Confidence in estimate w/in ½ inches Yes/No