STAT 13

(Sec. 1a-1c)

Introduction to Statistical Methods for the Life and Health Sciences

Instructor: Ivo Dinov, Asst. Prof.

Departments of Statistics & Neurology

http://www.stat.ucla.edu/~dinov/

Lab 2

Also see this for an additional tutorial.

Thursday, Oct. 11, 2001

In this short lab, you will use the Stata commands from last week to answer questions about data. If you would like to refer to the previous week's lab, you can CLICK HERE.

To get the dataset into Stata, type:

use http://www.ats.ucla.edu/stat/stata/webbooks/reg/crime

1. What are the mean and standard deviations of the variables crime, poverty, etc.? What are the medians, 25th percentile, 75th percentile, interquartile range, minimum and maximums for these variables?

2. Would it be better to use more robust measures (e.g. median, interquartile range) to summarize some of the variables? If yes, which variables are good candidates for using more robust measures and explain why. If no, just explain why the mean and standard deviations are appropriate for all six variables.

3. For each variable make a histogram and a boxplot.

Everyone should self-assess themselves.
And compare their work to the template solution (this is not a unique solution, just a template)

\Ivo D. Dinov, Ph.D., Departments of Statistics and Neurology, UCLA School of Medicine/