Los Angeles City College



Math 227 Stats ProjectThis is a required project for Math 167. This project is worth 200 points.?The report of the project must be typed except some graphs you may choose to draw by hand.?And you must submit a stapled paper copy of your report to answer all the things to be specified below.The following are the steps of the project and what your report should include along each step.Data CollectionRaise a general question. It can be related to your major, your hobby, or anything that interests you. For example, Does drinking more water each day relate to better health?Based on the general question you want to find an answer to, brainstorm at least 10?related?questions. These questions would be the variables you will use. Be sure you have quantitative variables (continuous variables and discrete variables) and categorical variables (some would have only two answers, and some would have more than two answers.). For example, you may ask their age, gender, heart beat, BMI, how energetic per day on a scale from 0 to 5 (no energy, some energy, normal energy, very energetic, hyper energetic), number of 16-ounze bottle of water a day etc if your general question is 'Does drinking more water each day relate to better health?". Be sure not to ask open-ended questions such as what, why, where. You can change your open-ended questions by giving out categories that you have set up.Decide what sources you will collect the information for your questions from step 2. You may go to website in which case you must quote the source information such as the URL of the website. You may go visit a local community in which case you must describe what community you approach. You may distribute your questions to your classmate in which case you must describe what class you ask.Collect your data. You must have at least 25 observations. Be sure all the data is from real life, and you are not allowed to use simulation to generate numbers.If you ask your classmate in this stats class, you must post your questions in Canvas under “Discussion”. Your posting must have “Survey (______your name)” as the subject, and your questions are numbered. Then you will collect all the answers from each of your classmates who reply to your question.If you collect your data from your stats classmates, as a courtesy, you must ask all the questions posted by all other classmate.If you collect your data from outside classroom, such as websites or your local community, you do not have to answer your stats classmates’ questions.Input your data into an electronic spreadsheet. The top row should be labeled with each variable name. The first variable should be the name of the person you asked. Only if you do not know the name of the person you asked, you can use ID in replace of names. So yours may look as the following:NameGenderAgeHeart beatTom SmithMale1870Sue RodriguezFemale3169Data SpreadsheetUpload your spreadsheet that includes?ALL?your observations in .xls format on Canvas under the Assignment "Project spreadsheet"Written ReportSubmit your paper report that you will address the followings based on?ALL?your observations:Provide your general question to investigate, and your survey questions.Describe your method to collect the data. Again, this refers to steps 3 and 4.Provide a snapshot of the raw information you collect. That is, if your data is from websites, you must include a snapshot of the webpage that contains the numbers you are using. If your data is from your stats classmates, you much include a Canvas snapshot of your question posting on Canvas AND a Canvas snapshot of answers from one classmate. If your data is from your local community, you must include any documentations (such as a paper you hand out, or a date you went) that you approached your community.Provide one page of the copy of your spreadsheet including the first rows and at least 25 observations. If you have more than 25 observations, you do not have to submit the data of all your observations.Provide your answers to the following questions:What sampling method(s) did you use? And explain why you think you have used such sampling method(s). Sampling methods refer to: random, convenience, cluster, stratified, systematic…What type of study is your project? And explain why you think you have used such type of study. Type of study refers to: observation, experimentalWhat are your control group and treatment group, if any?What are any possible placebo effects?What are any possible lurking variables?What are any possible confounding variables?Construct the following graphs, and comment what information you gather from each graph.A relative frequency tableA pie chartA stem-plotA time-series, if you have a variable of time.A histogramA scatterplotChoose a two-way table based on counts. Then convert the table to be based on proportions.Choose a variable toCalculate its 3 measures of the centerCalculate its 3 measures of the spreadComment on the shape of its distribution. And explain why you choose that shape.Apply the empirical rule.Identify any unusual observations.Calculate IQRIdentify any outliers, if any.Give a five-number summary.Construct a boxplotChoose two variables, and interpret their associationwhat is the explanatory variable, and what is the response variable?Is the association linear or non linear?Is the association positive or negative??As one variable increases, does the other variable increase or decrease?Is the association strong or weak? Explain why.Model the association with an equation.Find the Coefficient of Determination of the equation. And commend on the information given from the Coefficient of Determination.Construct the residual plot. And commend on the information given from the residual plotFind the Sum of Squared Errors of the equation. And commend on the information given from the Sum of Squared Errors.By using the model, make a prediction of a future value of your response variable. ................
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