Terms and understanding:
Median - the sample median is the value that most nearly lies in the middle of the sample.
Mean - the average or the mean of a sample is the sum of the observations divided by
University of California, Los Angeles
Department of Statistics
Statistics 13
Instructor: Nicolas Christou
Central limit theorem - Some problems
Problem 1
Part A:
It is claimed that the histogram below
Lab 1: Introduction to data
Some dene Statistics as the eld that focuses on turning information into knowledge. The rst step in
that process is to summarize and describe the raw information - the data
Stat 13 - Lab 2
The Binomial and Normal Distributions
Work through the lab instructions then work the problems in bold. You will turn
in only your work on the problems in bold.
Part 1
Review: if X ~ B
STATISTICS 13
Statistical Methods for the Life & Health Sciences
Winter, 14
Instructor: Dr. Gary Evans
Ofce: 8105F Math Sciences
Ofce Hours: T & Th, 11:30 - 1:00
Email: [email protected] (connected thr
| used to separate code
Kevin Nguyen
204-189-134
Stats 13 - Jalal
LAB 2
1. Exercise 1: How many cases are there in this data set? How many variables? For
each variable, identify its data type (e.g. ca
University of California, Los Angeles
Department of Statistics
Statistics 13
Instructor: Nicolas Christou
Homework 6
EXERCISE 1
Suppose that 60% of Los Angeles residents support the idea of constructi
Introduction to R and RStudio
The goal of this lab is to introduce you to R and RStudio, which youll be using throughout the course
both to learn the statistical concepts discussed in the texbook and
| used to separate code
Kevin Nguyen
204-189-134
Stats 13 - Jalal
LAB 2
1. Exercise 1: How many cases are there in this data set? How many variables? For
each variable, identify its data type (e.g. ca
1-Way ANOVA
Researchers conducted an experiment to determine if organic pest control methods
were effective in controlling the dreaded corn weevil. (Consider how you might design
such an experiment.)
David Pena
Statistics 13
Professor Almohalwas
2 March 2016
Article 3
Q1:
Six Steps
1. The purpose of this study was to assess the impact of a new curriculum on student
learning with both qualitative a
Stat 13 Winter 14 Lab 5
Least Squares Regression
Install the package faraway then type:
data(prostate)
attach(prostate)
Check:
dim(prostate)
If the data has been properly loaded, this should be 97 x 9
STAT 13
Lab3
Shengqian Liu
length(table(runif(1000)
Q1: What does this tell you?
[1] 1000
This gives us the number of elements that are drawn from 1000 random generated numbers in
uniform distribution
Something Completely Different - The Normal
We start with some basics about statistical variables.
Two types: numerical (quantitative) or categorical (qualitative).
Two types of categorical: nominal a
Statistics 13
Winter 2014
Midterm
This exam consists of 25 multiple choice questions covering lectures through Tuesday,
Feb. 4th.
For each question, select the one best answer and mark your choice on
The Normal Linear Model
Remember, the drawing of the least squares regression (LSR) line is just a calculus
problem. How does statistics become involved? Two ways.
1st: The scatterplot weve been worki
Power
!
Recall from the Guide to p-values:
Type I error occurs in a hypothesis test when we reject the null hypothesis when it is
true.
It is important to understand that Type I error does not mean th
Session 6 Notes 2/18/14
1. Normal Probability (QQ) Plot
2. Shapiro-Wilk Test
3. Binom.test / sign test
4. Wilcoxon Signed-Rank Test
Mann-Whitney-Wilcoxon U Test (a.k.a.Wilcoxon Rank Sum Test)
5. Power
Small, Non-normal Samples
Consider the following problem:
Medical researchers wish to test the survivability of cadaver-obtained skin grafts on
burn victims. They believe that grafts will last longer
Stat 13, W14, Homework 1
1. You wish to poll UC students on their satisfaction with campus services. You select
for questioning 200 students at random from each of the 10 UC campuses. This is an
examp
gender hand eyecolor glasses california birthmonth birthday birthyear ageinmonths height graduate oncampus time walk hsclass HSCA calculus AP cell ipod sleep alcohol speed UCLA book relax instructor t
Stat 13
Winter 14
Final Exam Review
Shapiro-Wilk test: shapiro.test
- Normal q-q plot
Mann-Whitney U test: wilcox.test(.,paired=F,.)
Power: the relationships between power, effect size, sample size, a
Key Ideas from Tuesday Lecture
Because of the mathematical demonstrations, it is often hard do discern from todays
lecture what the key ideas are; that is, the things that will be useful to us as we d
Common STAT 101 Commands for RStudio
Professor Kari Lock Morgan
For bootstrapping and randomization, load resample() and reallocate():
source("/shared/[email protected]/simulation.R")
1
One C