Question 1
0 / 1 point
1. The term "archaic Homo sapiens"
refers to forms that were transitional from Homo habilis to Homo erectus.
is another term for Homo erectus.
refers only to Neanderthals.
refers to forms that display some derived features of Homo s
Question
1 / 1 point
1
1. Hominids have been variably defined as having
a large brain.
toolmaking abilities.
adaptations for bipedalism.
all of these.
A and C only.
Question 2
1 / 1 point
2. Adaptive advantages of bipedalism include
freeing the hands for
Homework 3 Solutions
October 19, 2016
Note that these solutions have a lot more code in them than is necessary.
Im including them because soon were going to start using SWEAVE (or another markdown language) to prepare reports of analyses. These markdown
l
STATS HW#5 Fall 2016
ZHIYI PAN
November 2, 2016
a) Using the North Carolina data set posted on week six of CCLE.
ncbirths <- read.delim("C:/Users/zhiyi/Desktop/Stat 101A/HW5/births.txt")
for (j in 1:23)cfw_
for(i in 1:length(ncbirths[,j]) cfw_
if (ncbirth
Stat 101A HW#6
ZHIYI PAN
November 13, 2016
Part one: Using the UCLA stress echo data set
Stress <- read.delim("C:/Users/zhiyi/Desktop/Stat 101A/HW6/Stress2.txt")
attach(Stress)
m1n <- aov(maxhr ~ gender + newPTCA + gender:newPTCA)
summary(m1n)
#
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#
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D
Katie Lee
Statistics 10
Professor Christou
Discussion 4A
Week 1 Lab
1A.
>plot(c$Income,c$Life, main = "Life against Income")
As income increases, life expectancy dramatically increases until it levels out when
Katie Lee
Statistics 10
Disc 4A
Exercise 1: Breast cancer mortality data: The data contain breast cancer mortality (y) from
1950 to 1960 and the adult white female populations (x) in 1960 for 301 counties in Nort
LS2 SPRING 2015 Final Student Questions
1. Which of the following is FALSE about the cells in the nervous system?
a. Ependymal cells produce CSF
b. The ratio of glial cells to neurons in the brain is about 1:1
c. Glial cells function in support
d. Schwann
6/4/15
LS 2-2
Final Exam Review
Exam Location
Monday, June 08, 2015
8:00 AM - 11:00 AM
LAKRETZ 110
TAs: Michael and Sally and Devons
section 2N
MOORE 100
TAs: Roy and Jeanette and Devons
sections 2F and 2G
1
6/4/15
Format'
About'50'Mul0ple'choice'q
Stat 101A HW#4
ZHIYI PAN
October 24, 2016
Question one.
airfares <- read.delim("C:/Users/zhiyi/Desktop/Stat 101A/HW4/airfares.txt")
attach(airfares)
(a) Provide a detailed critique of this conclusion.
Based on the output for model(3.7), we can see that th
STAT 101A HW#1
ZHIYI PAN
September 30, 2016
Promble One
body_fat <- read.delim("C:/Users/zhiyi/Desktop/body_fat.txt", stringsAsFactors=FALSE)
a)
dim(body_fat)
# [1] 251
15
#There are 251 observations and 15 variables in the data file
b)
head(body_fat)
#
#
STATS 101A: Assignment #1 Solutions
Question 1
= $23727 and the sample standard deviation is s = $23624. For n = 30
a) The sample average is X
observations we get a standard error of se = 23624
= 4313.1326. The critical value used depends on what
30
assu
Syllabus
101A Fall 2016
Introduction to Data Analysis and Regression
This class is an introduction to statistical modeling with a (very strong) emphasis on
regression. Regression is perhaps the most commonly used
Statistics 101A
Homework 4
Question one. Problem one from chapter three 3.4 Exercises (The data file airfares.txt)
Question two. Problem three from chapter three 3.4 Exercises (The data file AdRevenue.csv)
Question three: Problem four from chapter three 3
STAT10LabExam
NAME_ID_TA_TIME_
USETHISTEMPLATETOWRITEYOURANSWERS,AFTERYOU
READTHE
INSTRUCTIONS
You must do this exam with Rstudio and individually. Talking with other
students or sharing notes is not allowed.
You will not be able to use the internet, emai
Answer Key for Article 1
1) Correlation measures the strength of an association between two variables (on a scale of -1 to 1). SLR
attempts to quantify this relationship and use it in an equation to make predictions.
2)
a) Base blood pressure and stress b
Stat 10 Sanchez
Lecture Homework 1
Instructions:
LAST Name: Kumari
First Name: Anjali
ID 504478830
Type your answers in this document. For multiple choice questions, just highlight or
indicate which is the right answer in the _ .
When done, save your file
HW 3 KEY F2016 Lec 1 and 2
Dr. Akram Almohalwas
October 21, 2016
This is an R Markdown document. Markdown is a simple formatting syntax for authoring
HTML, PDF, and MS Word documents. For more details on using R Markdown see
http:/rmarkdown.rstudio.com.
W
Finding Confidence Intervals with R
Data
Suppose weve collected a random sample of 10 recently graduated students and asked them
what their annual salary is. Imagine that this is the data we see:
> x
[1] 44617 7066 17594 2726 1178 18898 5033 37151 4514 40
HW 2 Simulation of r
Dr. Akram Almohalwas
October 7, 2016
This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and
MS Word documents. For more details on using R Markdown see http:/rmarkdown.rstudio.com.
When you
Stat 101A HW#2
ZHIYI PAN
October 6, 2016
Question one:
The major difference between correlation and simple linear regression is that the purpose of correlation
analysis is to measure and interpret the strength of a linear of nonlinear relationship between
Stat 101A HW#3
ZHIYI PAN - 804614096
October 11, 2016
Problem one
a)
HSB <- read.csv("C:/Users/zhiyi/Desktop/hsb2 jan13.csv", stringsAsFactors=FALSE)
names(HSB)[2] <- "gender"
1)
H0: The average math scores of male is equal to The average math scores of f
1
Introduction to Linear Models
Professor Esfandiari
Lecture one
The objective of the lectures is to
Give you a general overview of regression.
Remind you of the mean and standard deviation of a continuous
random variable.
Elaborate that the mean
Scatter Diagrams; Correlation
Bivariate data is data in which two variables are measured on an
individual. Often the purpose is:
to study the relationship between two variables: Correlation
problem or to predict one variable using the other: Least-squares
Chapter 5 updated
Dr. Akram Almohalwas
Sunday, November 09, 2014
This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and
MS Word documents. For more details on using R Markdown see http:/rmarkdown.rstudio.com.
W
One-Way, Two-Way Anova and Ancova
Akram Almohalwas
November 2, 2015
This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and
MS Word documents. For more details on using R Markdown see http:/rmarkdown.rstudio.com
Introduction to the
Analysis of Variance
(ANOVA)
Abbreviated as ANOVA
Used to compare the means of more than two
samples
Null hypothesis is that all populations being studied
have the same mean
Reject null if at least one population has a mean
that diff
Chapter 10
Describing the Relation Between Two Variables
Learning Objectives
1. Construct and interpret scatter diagrams
2. Compute and interpret correlation coefficients
3. Compute and interpret least square lines
4. Interpret residual plots
2
Scatter Di