Goal of this homework: To learn about the whole UCLA student body using a random sampling experiment. We will do that via

a survey that you will conduct on campus to collect data that you will enter in a google form due on November 16th before 11:55 PM.
a summary of the data collected by your group as indicated in instructions posted after everyone has submitted their data- Due November 18th before 11:55 PM.
an analysis of the data to see how probability can help us model what we discover with deadline December 1st before 11:55 PM.

Instructions for each milestone will be posted in a separate page of the homework module, one page for each milestone. Each milestone will open after the other is completed. There is no going back to make up things. The whole class' progress depends on everyone being on time.

There will be a grade for each milestore. The grades will be entered in MyUCLA. The total grade for the homework will be the sum of the three milestones' tasks.

Instructions for Milestone 1

SURVEY QUESTIONS AND CODEBOOK FOR DATA ENTRY

Type Questions 1-5 on a sheet of paper (without the codebook notes) and show them to undergraduate students interviewed so that they see the questions clearly. Edit their answers to adhere to the units listed in the codebook. The interviewees must be undergraduates to be eligible to participate in this survey.

Question 1: How much pressure do you feel because of the schoolwork you have to do? Enter the response in the google form as a numerical value as follows

1 no pressure 2 very little pressure

3 some pressure 4 a lot of pressure

Question 2: How long (how many minutes) does it take you to travel from the place where you live and the place where your first lecture is on the first day of the week when you have a lecture to attend?

Codebook: enter a nonnegative number without the units and no commas. It is minutes that we want, so convert hours to minutes if the interviewee gives hours.

Question 3: What do you think should be the ideal class size at UCLA (number of students per lecture).

Codebook: enter a nonnegative number without the units and no commas. It is minutes that we want, so convert hours to minutes if the interviewee gives hours.

Question 4: How many times per week do you take scooters to travel from one class to another?

Question 5: What is your main major (the major you are most passionate about if you are a double or triple major).

Codebook: Enter the major with the name that the major appears as in the Schedule of classes

Question 6 (this to be completed by the member of the group doing the interview): Enter the location at the UCLA campus where the interview takes place. Restrict the interview to the campus perimeter, as shown in the UCLA map. Each group should diversify locations. That is, each member of the group should get the subjects from different locations randomly chosen.

Question 7 (this to be completed by the member of the group entering the data in the google form): Enter the last four names of the group members.

SAMPLING PROCEDURE

Get together with your group, look at the UCLA map and decide which part of the campus each of you is going to survey. It helps to choose a part of campus that you frequent, and to do the survey at a time when there are most students on campus, i.e. a week day between 8 and 6 PM. All parts in the perimeter of the campus applies, except the hospitals and the medical centers- that is, anything beyond Charles E Young Drive South can be omitted.
Each member of your group will be asking Questions 1-5 to a random sample of 5 students, in person, at the UCLA campus. So in total, your group will interview 20 students. For this to be valid, each group must interview in total 20 students.
Each member of the group enters the data collected into the google form posted for that task before the deadline of November 16th before 11:55 PM. Entries after that will not be allowed. Each group must enter the group member's names and the location of each interview.
Procedure to choose the sample subjects. Ideally, we would have a list that we could number with all students at UCLA and then use software to select a random sample of 20 for each group. We each would get a different sample. Lacking that, we can do as in the airports' security: as you walk around the campus area that you will survey, count the number of students you see as you walk towards your classes or wherever you go on campus, and sample every 10th student you see.
- - Your friends and family or anyone related to you must be excluded. That would be a sample of convenience, not a random sample.
  - Try to diversify your walking paths so that you do not ask always people from one single place (for example, we do not just want the opinion of the the DeNeve dorm people).
  - Avoid asking the same person twice.
  - You do not need to do all at once, but try to avoid duplicates.
Procedure for approaching the subjects: stop the student and ask whether they are UCLA students. Tell them that you are too and that you are doing a survey for a class. Expect "I do not have time" (nonresponse is a major problem in surveying). You each need to get 5 students, so you do not give up. Ask the student whether any other student has approched them with the questions you will ask (to avoid duplicates).
- If the student has already been interviewed by another member of the class, then that student should not be interviewed again.
- If the student hasn't been interviewed yet, ask the five questions, and record them in a spreadsheet or in a way that you can enter them accurately in our google sheet.
- If the student chosen is going with someone else, do not interview the someone else. Related people should be avoided. Do not get lazy and choose groups of people at once. They are likely to make the sample biased.
- You should not express your opinion and you should keep a poker face to whatever they respond. That way, the only error in our conclusions will be chance error (i.e., people are different, that is why they answer differently, but statisticians call that chance error as if being different was an error), and not errors due to the surveyor's attitudes or way of asking the questions. The latter errors can not be measured, but we will be able to measure the chance error somehow.

Submission instructions for milestone 1

Milestone one. By November 16th, before 11:55 PM submit to google doc 1 assigned for it. Each member of the group must do (notice that each member of the group must select a separate random sample of 5 students, so each group will provide 20 different responses)
- - Click to submit data to google form 1,where you will be able to enter the data collected from your sample. Each member of the group enters their own data.