Introduction to Statistics: Week 2 Assignment � Data Types, Variables, and Statistical Concepts

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Introduction to Statistics: Week 2 Assignment–Data Types, Variables, andStatistical ConceptsWeek 2 Problems1.Choose the correct answer bellow:A. It is an estimate or prediction or some other generalization about apopulation based oninformation contained in a sampleB. It is a characteristic or property of an individual experimental unitC. It is the process used to assign numbers to variables of individual populationunitsD. It is the science that deals with collection, classification, and interpretation ofinformation or data2. Explain the difference between qualitative and quantitative dataChoose the correct answer bellowA. Quantitative data are collected from an observational study , whilequalitative data are from a designed experimentB. Quantitative data are data from a sample, while qualitative data are datafrom a populationC. Quantitative data are numerical in nature, while qualitative data arecategorical in natureD. Quantitative data are data from a population, while qualitative data aredata from a sampleE. Quantitative data are categorical in nature, while qualitative data arenumerical in natureF. Quantitative data are collected from a designed experiment, whilequalitative data are from a observational study3.Explain how populations and variables differ.Choose the correct answerbellow:

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A. A population is a set of units of interest to a study. A variable is a subset of theunits of a populationB. A variable is a set of units of interest to a study. A population is a characteristicor property of the units being studied.C. A population is a set of units of interest to a study. A variable is an objectupon which data is collectedD. A population is a set of units of interest to a study. A variable is acharacteristic or property of the units being studied4. Define statisticalthinking. Choose the correct answer bellow:A. Statistical thinking involves applying rational thought and the science ofstatistics to critically assess data and interferencesB. Statistical thinking is a statement about the degree of uncertainty associatedwith a statistical inferenceC. Statistical thinking utilizes sample data to make estimates, decisions,predictions, or other generalization about a larger set of dataD. Statistical thinking is a series of actions or operations that transforms inputs tooutputs5. Suppose you’re given a data set that classifies each sample unit into one offour categories: A,B,C or D. You plan to create a computer database consistingof these data, and you decide to code the dataas A=, B=, C=3, and D=4. Arethe data consisting of the classifications A, B, C, and D qualitative orquantitative? After the data are input as 1, 2, 3, or 4, are they qualitative orquantitative?Are the dataconsisting of the classifications A, B, C, and D qualitative orquantitative?A. Quantitative, because they are measured on a naturally occurring numericalsaleB. Quantitative, because they can only be classified into categoriesC. Qualitative, because they can only be classified into categories

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