Welcome to STATS 250 Lab

Julie Ghekasjghekas@umich.edu

September 8, 2014

Section 008/010Monday 8:30-10:00/10:00-

11:30Mason Hall G444C

Introductions Scavenger Hunt Syllabus Lab 1 iClicker Questions

Schedule

About Your GSI

Arrange yourselves in alphabetical order by first name without talking.

Challenge

Name Year in School Major Birthday Biggest Accomplishment to date

It’s Your Turn

Each group (2-4 people) works on the Scavenger Hunt You will not get credit if you do not work with a

group

10-15 minutes Introduce yourselves to each other and to class

websites and materials

Scavenger Hunt

Read the syllabus. It has important information and can answer many questions.

Academic Integrity. Be fair to your classmates, your instructors, and yourself. Collaboration is encouraged on the homework, but answers should be composed independently.

Reasonable work for all homework problems must be shown for full credit.

Attendance for lab is mandatory. Talk to me reasonably in advance if you need to miss.

Homework Due: Thursdays at 8 am Pre-lab Due: Mondays at 8 am

Syllabus

Held in SLC (Science Learning Center); 1720 Chem

Sunday 1-4 Monday 9-5 Tuesday and Wednesday 9-9 Thursday 9-2:30 Friday 10-2 Mine are Wednesdays 2:30-3:30, 5:30-7:30 Instructors also hold office hours

Office Hours

Exams: 80% Homework and lab work: 20%

Homework: 12% Pre-labs: 2% Lab Tickets: 2% iClicker: 2% Participation: 2%

If you miss a lab, your final grade will be deducted by a full percentage point. You are allowed two make up labs.

Grade Breakdown

Make sure that you are enrolled in my section on Lecturebook. Should have done during Scavenger Hunt

Check that iClickers are connected. Hold the power button until the lights start

blinking Press the “C” button twice

Lecturebook and iClickers

Are you a dog or a cat person? A. All animals are scary B. Both C. Cat D. Dog E. Either—I’m indifferent

iClicker Practice

Inception: Computer edition

Access SPSS from a non-school computer

http://virtualsites.umich.edu

Virtual Sites

Measures of center: numerical values that tend to report the middle of a set of data

Mean: the sum of the observations divided by the number of observations, n

Median: if the numbers are arranged from smallest to largest, the number such that at least half of the observations are less than or equal to it and at least half of the observations are greater than or equal to it

Center

Warm Up

Open employee data.sav Work with a partner or two

You will not receive credit for today if you work on your own

Complete the Cool Down and Example Exam Question if you have extra time

In Lab Project (ILP)

Lab 1

Lab 1

Lab 1

Cool Down

Example Exam Question

Example Exam Question

Which of these variables is categorical?

A. Height (in inches)B. Test score (out of 100 points)C. UM local zip code (e.g., 48109)D. Number of roommatesE. None of the above

iClicker

Which of these variables is categorical?

A. Height (in inches)B. Test score (out of 100 points)C. UM local zip code (e.g., 48109)D. Number of roommatesE. None of the above

iClicker

Which one of the following variables is not categorical?

A. Age of a personB. Gender of a person: male or femaleC. Choice on a test item: true or falseD. Marital status of a person: single, married,

divorced, other

iClicker

Which one of the following variables is not categorical?

A. Age of a personB. Gender of a person: male or femaleC. Choice on a test item: true or falseD. Marital status of a person: single, married,

divorced, other

iClicker

A good way to display the distribution of a categorical variable is with a…

A. HistogramB. Bar chartC. Box plotD. All of the above

iClicker

A good way to display the distribution of a categorical variable is with a…

A. HistogramB. Bar chartC. Box plotD. All of the above

iClicker

iClicker

Based on the histogram for weekly spending on entertainment by college students ($), the mean is expected to be larger than the median.

A. TrueB. False

iClicker

Based on the histogram for weekly spending on entertainment by college students ($), the mean is expected to be larger than the median.

A. TrueB. False

How do you feel about the material covered today?

A. Completely understand everythingB. Understand main ideas, shaky on detailsC. Good for the first half of lab, lost for the

secondD. Had trouble with some of main ideasE. Difficulty following most material

iClicker

Practice Homework due Thurs, Sept 18 at 8 am

Pre-lab 1 due today at 8 am Pre-lab 2 due Monday at 8 am Turn in your yellow ticket

Take Away Points