MATH 221 Week 2 Lab Assignment

Statistical Concepts that you will learn after completing this iLab: • Using Excel for Statistics • Graphics • Descriptive Statistics • Empirical Rule Week 2 Lab Instructions-BEGIN • Data have already been formatted and entered into an Excelworksheet. • Obtain the data file for this lab from your instructor. • Use the Week 1 spreadsheet (available from the top of the Week 1 Lesson) for graphs and calculations. You will need to copy data from the data file into the calculations spreadsheet to answer some questions. • The names of each variable from the survey are in the first row of the Worksheet. This row has a background color of gray to identify it as the variable names. All other rows of the Worksheet represent a certain students’ answers to the survey questions. Therefore, the rows are called observations and the columns are called variables. On page 6 of this lab, you will find a code sheetthat identifies the correspondence between the variable names and the survey questions. • Follow the directions below and then paste the graphs from Excel in the grey areas for question 1 through 3. You will be using the Week 1 Excel Sheet for many of the calculations. Type your answers to questions 4 through 11 where noted in the grey areas. When asked for explanations, please give thorough, multi-sentence or paragraph length explanations. • The completed Lab Word Document with your responses to the 11 questions will be the ONE and only document submitted to the Week 2:Lab. When saving and submitting the document, you are required to use the following format: Last Name_ First Name_Week2Lab. Week 2 Lab Instructions-END • Creating Graphs • Calculating Descriptive Statistics Short Answer Writing Assignment All answers should be complete sentences. 1. What is the most common color of car for students who participated in this survey? Explain how you arrived at your answer. 2. What is seen in the scatter plot for the Drive and Money variables? Explain your answer. 3. What is seen in the histogram created for the driving distance of students in this class (include the shape)? Explain your answer. 4. Compare the mean hours of sleep for males and the mean for females in these data. Compare the values and explain what can be concluded based on the numbers. 5. Compare the standard deviation for the sleep of males and the standard deviation for the sleep of females in the class. Compare the values and explain what can be concluded based on the numbers. 6. Using the empirical rule, 95% of female sleep amounts should be between what two values? Either show work or explain how your answer was calculated. 7. Using the empirical rule, 68% of male sleep amounts should be between what two values? Either show work or explain how your answer was calculated. Code Sheet The Code Sheet just lists the variables name and the question used by the researchers on the survey instrument that produced the data that are included in the data file. This is just information. The first question for the lab is after the code sheet.