# College Math Ch 5

 Qualitative Data Describes qualities or non-numerical categories Quantitative Data represents counts or measurements Qualitative Data Describes qualities or non-numerical catagories: Not numbers Population In a statistical study is the complete set of people or things being studied. Sample Is the subset of a population from which the raw data are actually obtained. Population Parameters Are the specific characteristics of the population that a statistical study is designed to estimate Sample Statistics Are numbers or observations that summarize the raw data. Representative Sample Is a sample in which the relevant characteristics of the sample members match those of the population. Simple Random Sampling Sampling method that randomly chooses subjects w/ no order or specific criteria Systematic Sampling Sampling Method that uses a method or specific way to choose the subjects Convenience Sampling Sampling method that uses convenince in choosing its subjects. Stratified Sampling Sampling Method that chooses a subset with in a subset Observational Study 1 of 2 different study methods. Based on observation. No contact. No affecting population. Experiment 1 of 2 study methods: Apply treatment to some or all the members of a study. Treatment Group the group that receives treatment in an experiment study Control Group The group that does not receive treament in an experiment study. May get a placebo. Placebo Fake treatment. example: sugar pill Placebo Effect False effects. All in your mind. Because you received a treatment, you believe you feel the effects. Single Blind An experiment when the participants do not know whether they are members of the treatment or the control group, but the experimenters do. Double Blind An experiment when neither the participants nor the experimenters know who belongs to the treatment or control groups. Case Control Study An observational studay that resembles an experiment because the sample naturally divides into 2 or more groups. Statistics statistics The science of statistics which helps us collect, organzie and interpet data (are the data that describe or summarize something) Authorwilliamtruly ID23838 Card SetCollege Math Ch 5 DescriptionChapter 5 ABDE Updated2010-06-25T03:35:16Z Show Answers