G&W 9e: Chapter 1 HW Solutions
2)
A parameter is a characteristic of a population. A statistic is a characteristic of a sample.
The statistic is our best estimate of the parameter when the population is not available.
14)
a) Ordinal measures have an order
Mohamad ElSayed
STAT 113
11/9/2016
Part C
In the data set that we are given we can see that we have thirteen different variables to
choose from. These variables are: COMP, SEX, HSP, GPA, AGE, CREDITS,
CLASS, COLLEGE, MAJOR, RESIDENCY, TYPE, MATH, ENGLISH.
STAT 113-05
10 April, 2016
PART C
12 Pairs:
Age and Class - By analyzing the age and class of a student we can conclude if
the person ever got left behind, took time off, or if they have any medical reason
to be behind the average student. This is importa
Stat 113
High School Percentile & Cumulative College Grade Point Average
This graph shows the correlation between High School Percentile and Cumulative
College Grade Point Average. The high school percentile shows what rank the student
was in their high s
Statistics 113
October 5, 2016
Part B: Description of the Variables
Variable 1: SEX
Colleges often want to maintain a balanced student community. The diversity of
both males and females encourage hard work and good grades. As seen in previous
college acce
Statistics 113
25 September 2016
Part A: Pre-Project Plan
In this statistics project, I am expected to analyze a set of data known as the
Midwest Scholastic Data to determine which students are most successful at the
University of West Erlham County. I am
Statistics 113
Professor Thaler
29 October 2016
Project Part C: Comparing Variables
1. Age and Class
The combination of these the variables, age and class can tell whether the
students age corresponds with his/her classification. In other words, it revea
Mohamad Elsayed
STAT 113
Part A
In this course we will be researching an objective in that we will try to answer. This
research objective that we are trying to answer with our analysis would be what factors and
variables make up a successful student. This
Project Part D
Olivia Lam
Professor Liang
In Part D of this project I will be discussing six important pairs of variables that will be
useful for the University of West Erlham County. The six important pairs that I will be using to
compare to each other i
Hunter College of CUNY Fall 2014
Elementary Probability and Statistics - STAT 113.01 Code 12325 (3 Credits)
M, Th (HN 305) 8:10 am 9:25 am
Instructor: Alejandro Falchettore
Email: [email protected]
Office Hours:
Monday 7:00pm to 8:00pm at the Dolcia
AS2-56-41: Canadian Income According to Statistics Canada, in 2004 the median household income in Canada was $58,100 and the mean was $76,100.What would you predict about the shape of the distribution? Why? The shape of the distribution would be skewed to
Statistics113 Fall2010
Normal Density (Part 1)
1) The distribution of heights of American women aged 18 to 24 is approximately normally distributed with mean 65.5 inches and standard deviation 2.5 inches. Using the 68-9599.7 Rule answer the following ques
Randomness and Intuitive Probability
Stat113 Click to edit Master subtitle style
2/16/11
Basic Terminology
Outcome: Possible result of an experiment or phenomenon Sample Space: Set of all possible (relevant) outcomes Event: A set of outcomes (any subset o
Conditional Probability
Stat113
Review
For a sample space of equally likely outcomes, given two events A and B P(A) =
#outcomes in A / #total outcomes
P(B)
= #outcomes in B / #total outcomes
P(A and B) =
#outcomes in both A and B / #total outcomes
Ch9: Regression
Stat113
Correlation
Weve seen that correlation measures the linear relationship between two variables
In what direction? (pos. or neg.) How strong? (close to 1, or to -1)
When two variables are strongly correlated, if we know an individ
Class 4
Stat113 Click to edit Master subtitle style
2/16/11
Review
Density Curve: A mathematical model of the distribution of a variable
Approximates a histogram
Given actual data for a variable X, one can:
View a histogram of X Answer questions about the
Stat 113
Distributions Master subtitle style Click to edit and their Summary Statistics
2/16/11
Distribution
Activ Stats: The distribution of a
variable gives the values the variable can take on, and tells how frequently it takes on each of these values
I
STAT 113
Class 2
Data and Measurement The Distribution of a Variable
OBJECTIVE A: DATA
What is data?
Values, Labels, or Names that record/contain information about individuals in an orderly fashion, together with a context
Example:
Each row represents a
Class 7
Stat 113
Box plots
A graphical representation of a variable Illustrates center, spread, and skewness Takes a 5 number summary perspective good for broad comparisons between classes of individuals
For example, one might compare heights of individ