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Chapter2: Measuring Center and Dispersion, Part I
Page 1
When someone hands me a set of quantitative data, there are three things I want to know:
Where is the _ of the data, how much _ is there, and what is
the general _ of the distribution?
1.
1
Measures
Marine Science Review
1.
In 2014, the European Space Agency's Rosetta mission landed on comet
67P/Churyumov-Gerasimenko. The spacecraft detected the presence of water ice on
the comet. Does this finding allow the outside-in model to be elevated to a scien
AP Lang Film Assignment
Three Short Films About Peace
by Errol Morris
Leymah Gbowee
Lech Walesa
Bob Geldof
Documentary Film Analysis Worksheet
Step 1. Pre-viewing
Title of Film:
Date Released:
Principle filmmaker(s):
What do you think you will see in this
MINITAB PROJECT 2
MINI-PROJECT 2
Choose 15 of each of two types of magazines (news, sports, fitness, entertainment, and
so on) and record the percentage of pages that contain at least one advertisement.
Using these percentages and the types of magazines:
For the most part it does not seem that the statistics of each salesperson are similar to the others.
In fact, when comparing the salespersons there are large gaps between each salespersons respective
mean, median, and standard deviation.
Boxplot of A, B,
MINITAB PROJECT 4
Spring 2014
MINI-PROJECT 133
Two friends are arguing about the relationship between the prices of soft drinks and
wine in U.S. cities. Justin thinks that the prices of any two types of beverages (a soft
drink and wine) should be positive
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Poetry Analysis Rubric
Title of Poem: _
Type / Form of Poem: _
Name of Poet: _
1. Analyze the effectiveness of the poems Music / Identify any Sound Devices?
2. Analyze and interpret the poems Emotional Impact / Identify and Discuss the
overall Tone or Moo
1
STAT 2231 - Homework #2
1. a. Descriptive Statistics are the numerical and graphical methods
involving the collection, presentation, and characterization of a set of
data.
b. Inferential Statistics is used to estimate, predict, and/or make decisions
abo
Homework 7 Regression Analysis
1. a. Model is AKA formula, equation, function, line
b. The goal of a regression model is to predict the response variable
based on information from the explanatory variable.
c. Y-intercept is the value of Y when X = 0.
d. S
Homework 5 Using the 68-95-99.7 Rule
1. a. 68% of the observations in the data set will fall within one standard
deviation of the mean.
b. Outliers fall outside the 95% interval (above or below the interval
2s).
X
c. Significant outliers fall outside the
Homework 8B Probability
1. a. A random experiment is an act or process that leads to a single
outcome that cannot be predicted with certainty.
b. A simple event is one outcome of a random experiment.
c. A simple event is AKA a marginal event.
d. The sampl
What are homework groups? I dont think I will have time this semester to work with a group
on homework.
Homework will NOT be done in groups. Homework group numbers are used to help me
organize the collection, grading, recording, and return of your homewor
Homework 8-A Proportions
1. a. Categorical data are non-numerical characteristics of the subjects used
in the data collection.
b. Categorical data is AKA qualitative data.
c. p is the notation for the population proportion of successes.
d. is the notation
Homework 6 Scatter Plots & Correlation1. a. The response variable is the variable you wish to predict or is of
interest.
b. The response variable is AKA the dependent variable.
c. The response variable is denoted by Y or y.
d. The explanatory variable is
Homework 8-A Proportions
1. a. Categorical data are non-numerical characteristics of the subjects used
in the data collection.
b. Categorical data is AKA qualitative data.
c. p is the notation for the population proportion of successes.
d. is the notation
Homework 4 Measures of Spread
1 a. Synonyms for the amount of spread in a data set are the amount of
variation or scatter or dispersion in the distribution.
b. Range, 5 Number Summary, Variance, Standard Deviation.
c. Range
d. Range
e. 3 Quartiles
f. Firs
Homework #3 Measures of the Center & Shape
1 a.The synonym for describing a data set is summarizing a data set.
b.A distribution is a data set.
c.The mean and median describe the center of a quantitative data set.
d.The mean measures the center of a quant
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Ii_
Scatter Plots & Regression
cal skill is to be able to dqsqibe a relaliqlship between
iables. Statistically established relationships do not
prove that variable A "causes" a certain outcome for variable B. lnstead,
statistics allows one to show that va
t
Normal Distribution
One of the most useful and frequently encountered distributions is for a continuous
(measureable) variable. A measureable variable can take on an infinite number of
values, hence if graphed, the histogram will have an infinite number
STAT 2231
Histogram & Time Plot Examples
Goa.L
c
You are interested in buying a used 201.A Dodge Maxi van, but would like to know
more about the number of miles-per-gallon the vehicle earns. The current owner
provides you the mile-per-gallon (mpg) values
p"te
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MANDATORY ASSIGNMENT _ EXtrA
The following assignment is to ensure that each student has read the syllabus. The assignment must be
individually. lf you turn in this assignment within 1 class period of receiving it
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correlation & the coefficient of Determination
A residual plot can be used
the data. A numerical summary measure can be used to determine the
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our understanding of the relationship.
fits
it, the better
CORRELATION AruilLYSIS
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Chapier 1
Picturing Distributions with Graphs
Graphs or charts are an excellent way organize and present data. The
graph will present the DISTRIBUTION of values the variable/characteristic
takes on. Different types of dat