Lesson 17: Introduction to Inference
Saturday, October 15, 2016
9:00 PM
Components of the Statistics Problem Solving Process
1. Producing Data
2. Data Summarization
or Exploratory Data Analysis
3. Probability
4. Statistical Inference
Inference:
Lesson 12: Normal Probability Distributions and Stand
Scores
Tuesday, October 4, 2016
8:47 PM
Notation- Density Curves vs. Histograms
The notation for mean and standard deviation is different for density curves (popu
histograms (samples)
Characterist
Lesson 9: Examining Distributions with Numerical
Measures Part 2
Tuesday, October 4, 2016
8:47 PM
Median, range and IQR determined by 5 numbers: (5 # summary)
min (minimum)
Q1 (1st quartile)
med (2nd quartile, median)
Q3 (3rd quartile)
max (maxi
Lesson 10: Introduction to Probability
Tuesday, October 4, 2016
8:47 PM
Probability Theory
components:
1. specify game (including strategy if applicable)
2. specify possible outcomes
3. specify probability distribution = long run of proportions assoc
Lesson 7: Examining Distributions of Quantitative
Variables with Graphs
Tuesday, October 4, 2016
8:47 PM
Analysis of Distribution for Quantitative Data
1. Always plot your data first.
2. Look for an overall pattern and for striking deviations such as
Lesson 8: Examining Distributions with Numerical
Measures Part 1
Tuesday, October 4, 2016
8:47 PM
Summarize the distribution of a quantitative variable with measures of:
center
spread
shape
Measures of Center
1. mode = value corresponding to a
Lesson 18: One-sample T Confidence Interval for Mea
Saturday, October 15, 2016
9:01 PM
We cant say probability when talking about , so we use confident.
Constructing a 95% Confidence Interval for mu
x 1.96 / n
General formula for C% confidence in
Lesson 11: Random Variables and Probability Distribu
Tuesday, October 4, 2016
8:47 PM
Probability distribution
set of possible outcomes in sample space AND the probability (or %) associated wit
e.g., all presidential candidates considered by Salt Lake
Lesson 14: Sampling Distribution of x-bar and the Cen
Limit Theorem
Saturday, October 15, 2016
9:00 PM
Review
population the entire group of individuals that is the target of our interest
sample a subgroup of the population from which we obtain infor
Lesson 6: Designs of Experiments
Tuesday, October 4, 2016
8:47 PM
Valid Experimental Designs
Randomized Controlled Experiment: subjects randomly assigned to
treatments
Randomized Block Design (RBD)
matched pairs, a special case of RBD
Randomized
Lesson 13: The Standard Normal Distribution and its
Application
Tuesday, October 4, 2016
8:47 PM
Standard Normal Distribution
Normal density curve with =0 and =1
area under curve = proportion
areas under curve for standard normal completely spec
Lesson 19: Margin of Error and Sample Size Calculatio
Monday, October 17, 2016
8:41 PM
Confidence Interval:
A range of plausible values that the population parameter could be
Margin of Error
x m
(Likely) maximum difference between statistic and par
Lesson 16: Statistical Process Control
Saturday, October 15, 2016
9:00 PM
Statistical Dogma for Processes
All processes have natural variation
raw material, human performance, equipment performance,
measurement
All processes occasionally susceptibl
Lesson 15: Calculating Probabilities Associated with x
Saturday, October 15, 2016
9:00 PM
Statistical Practice
Take one sample of size n
Compute x for the sample as estimate (guess) of
Use knowledge of sampling distribution of x in general to say
Lesson 4: Collecting Data- Experiments
Tuesday, October 4, 2016
8:46 PM
Probability samples may have a bias due to:
Under coverage
Some individuals have no possibility of being selected
Examples: homeless, phoneless
Non-response
Selected individu
Lesson 2: The Big Picture and Exploratory Data Analys
Thursday, September 1, 2016
2:38 PM
Statistics is converting data into useful information
Process of Statistics:
Collect data
Summarize data
Interpret data
The process of statistics start when we id
Lesson 3: Collecting Data- Sampling & Sample Survey
Thursday, September 1, 2016
3:31 PM
Sample Survey (Poll)
Definition:
a type of observational study in which individuals report variables values
themselves, frequently by giving their opinions
Purp
Lesson 1
Thursday, September 1, 2016
2:26 PM
What is Statistics
1. Science of extracting meaning from data
2. Art of persuading the universe to divulge info about itself
3. Methodology for using data to answer questions in the presence of variety
Dogma o
Brian Harris
Section 005
Writing Assignment 1
1) What is the population of interest?
-The population is all working Utah residents.
2) What is the parameter of interest?
-The true mean length of commute time for all working Utah
residents.
3) Give the con
Brian Harris
Stat 121
Section 005
Writing Assignment #2
PART A
STATE:
At the = 0.05 level, is there sufficient evidence to conclude that fewer than half of
American adults think that humans developed from earlier species of animals?
PLAN:
1) Test Procedur
BYU STAT 121 Final Definitions
Study online at quizlet.com/_1ahctp
1.
2.
3.
4.
5.
alternative
hypothesis
A statement about the value of a parameter
that is either "less than," "greater than," or
"not equal to" a hypothesized number or
another parameter; t
stats 121 final
Study online at quizlet.com/_efmo2
1.
#57
.
2.
Definition of
residual?
Residual = observed y minus predicted y
3.
Difference
between a
confidence
interval for
the mean of
the y's and a
prediction
interval
A confidence interval is an interv
BYU Stats 121 Exam 1 Terms
Study online at quizlet.com/_1yrr21
1.
2.
association
bar graph
Values of one variable tend to occur with
certain values of another variable; detected
when the conditional distributions differ from
the marginal distribution and
STATS 121 Exam 2 Vocabluary
Study online at quizlet.com/_17xhx4
1.
bias
A condition that occurs when the design
of a study produces a sample that is not
representative of the population.
2.
blocking
The grouping of individuals according to
some characteri
Stats 121 Final BYU
Study online at quizlet.com/_1fbf51
1.
48. 'Statistically significant' is
synonymous with all of the
following except one. Which
statement is an
INCORRECT STATEMENT?
a. The probability of the null
hypothesis being true is less
than alp
Stats 121 Midterm 2
Study online at quizlet.com/_22lq7j
1.
bias
a condition that occurs when the design of a
study produces a sample that is not
representative of the population
2.
blocking
the grouping of individuals according to some
characteristic like
Stats 121 Midterm 1
Study online at quizlet.com/_1yxo5y
1.
2.
3.
4.
association
bar graph
boxplot
categorical
data
Values of one variable tend to occur with
certain values of another variable; detected
when the conditional distributions differ from
the ma
STAT 121 Chapter 1
Study online at quizlet.com/_s8i1v
1.
3 Steps of
making a
histogram
Choose the classes, count the individuals and
draw the histogram
20.
Split stems in a
stemplot
Doubles the number of stems when
all the leaves would otherwise fall on
j
Stats 121 FINAL
Study online at quizlet.com/_26wnk2
1.
ANOVA
a procedure used to test equality of
three or more means
2.
association
for quantitative data, large values of one
variable tend to occur with certain
responses of the other variable.
associatio