homework summary.docx - 1.20 In 2008 a university in the...

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1.20 In 2008, a university in the midwestern United States surveyed its full-time first-year students after they completed their first semester. Surveys were electronically distributed to all 3,727 students, and responses were obtained from 2,821 students. Of the students surveyed, 90.1% indicated that they had studied with other students, and 57.1% indicated that they had tutored another student. The report also noted that 61.3% of the students surveyed came to class late at least once, and 45.8% admitted to being bored in class at least once. a. Describe the population of interest. b. Describe the sample that was collected c. Describe a parameter of interest. d. Describe the statistic used to estimate the parameter in (c) Answer (a) All 3,727 full-time first-year students at the university. (b) The 2,821 students who responded to the survey. (c) The proportion of all 3,727 students who studied with other students. (d) The proportion of the sample of2,821 responding students who studied with other students 1.27 A sample of 62 undergraduate students answered the following survey: 1.Whatisyourgender?Female______Male______ 2.Whatisyourage(asoflastbirthday)?______ 3. What is your current registered class designation? Freshman ______ Sophomore ______ Junior ______Senior ______ 4. What is your major area of study? Accounting ______ Computer Information Systems ______Economics/Finance ______ International Business ______ Management ______ Retailing/Marketing ______Other ______ Undecided ______ 5. At the present time, do you plan to attend graduate school? 6.What is your current cumulative grade point average?______ 7.Whatisyourcurrentemploymentstatus? 8. What would you expect your starting annual salary ( in$000 ) to be if you were to seek full-time employment immediately after obtaining your bachelor’s degree? ______ 9. For how many social networking sites are you registered? ______ 10. How satisfied are you with the food and dining services on campus? 11. About how much money did you spend this semester for textbooksandsupplies?______ 12. What type of computer do you prefer to use for your studies? 13. How many text messages do you send in a typicalweek? ______ 14. How much wealth (income, savings, investment, real estate, and otherassets) would you have to accumulate (in millions of dollars) before youwouldsayyouarerich?______ a. Which variables in the survey are categorical? b. Which variables in the survey are numerical? c. Which variables are discrete numerical variables?
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2.5 A categorical variable has three categories, with the following frequencies of occurrence: a. Compute the percentage of values in each category. A: 38% B: 56% C: 6% b. What conclusions can you reach concerning the categories? From the data as above, most of value of (56%) belongs to Category B.
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