MKTG 3710 Activity 2: Sample Size

Activity #2 Sample Size Calculations and Data Quality issues (10 points) Part A: Calculate Sample Size (5 points) Refer to the standard sample size formula and use it to calculate the appropriate sample size for each of the following six cases. Each case represents a different question on a survey. Show your work to receive full credit. Also, which of the following cases has the highest sample size? Explain. Case Confidence Level Value of p Allowable Error Sample Size Alpha 95% 55% + 3.5% Beta 95% 65% + 3.5% Gamma 95% 75% + 5% Delta 99% 50% +3% Epsilon 99% 60% + 2.5% Zeta 99% 70% + 4% Part B: Identifying Data Errors (5 points) Identify the types of error for each of the following situations. Please state whether the error is because of the interviewer or the respondent. Additionally, please state whether the error was intentional or unintentional. Justify your answers: 1. A respondent says, "No opinion" to every question asked. 2. An interviewer intentionally turns in fraudulent questionnaires to get more compensation. 3. A respondent lies on a questionnaire about their workout habits because the person administering the questionnaire is attractive. 4. A respondent who lost her job gives her last year's income level rather than the much lower one she will earn for this year. An interviewer forgets to ask a question on a survey because they have been working for over five hours strait without a break 6. A respondent ends a telephone interview abruptly by hanging up the phone without any warning 7. A respondent does not understand what a word means on the questionnaire, so they just guess for that question. 8. A respondent grumbles about doing the survey, so an interviewer just skips the demographic questions. 9. An interviewer misunderstands the directions and administers the survey to someone who is not part of the population of interest. 10. A respondent accidently skips a question on the survey