Ch 3 Calculating Descriptive Statistics (pp. 77130)
Sec 3.1 Measures of Central Tendency (pp. 7890)
The Central Tendency is a single value that
describes the center of where the data has a
tendency to cluster.
CQ1s Some measures of central tendency are:
(
Formulae
Standard deviations
Population standard deviation:
)2
n
i (xi
=
=
(
x2
i
n
=
2
x2
i
2
n
xi )
n
Sample standard deviation:
s =
=
(Xi X)2
n1
(
Xi2
n1
Xi )
n
2
Bayes theorem
Let E1 , E2 , . . . , Ek be a set of mutually exclusive events that co
=AVERAGE(number1, [number2], .)
Returns the average (arithmetic mean) of its arguments, which can be numbers or
names, arrays, or references that contain numbers
=BINOM.DIST(number s, trials, probability s, cumulative)
Returns the individual term binomial
Ch 4 Introduction to Probabilities (pp. 147181)
Sec 4.1 An Introduction to Probabilities (pp. 148155)
Why Probability in a Statistics Course?
Probability gives us a way of saying how likely an
event is.
Things are random. You want to know how likely
it is
Ch 5 Discrete Probability Distributions (pp. 193233)
Sec 5.1 Intro to Discrete Probability Distributions (pp. 195205)
Identify the following data as either
(A) Discrete or (B) Continuous
CQ2 Number of people who visit Best Buy
between 10am-Noon today
CQ3
Ch 9 Hypothesis Testing for a Single Pop. (pp. 383422)
Sec 9.1 An Introduction to Hypothesis Testing (pp. 384390)
From Confidence Intervals to Hypothesis Testing
Statistics uses observed data to make informed suppositions about a
population.
Confidence in
X
Estimate the Population
Mean Using Normal
Distribution
Shiaw-Fen Ferng, Ph. D.
Indiana State University
1
Objectives
SEM
n
SEM: Standard error of the mean
Calculate Z value with SEM
Calculate and interpret confidence intervals
Application of Z value
W
+
In Class Exercise
April 16, 2014
+
Prompt
A survey of 1000 students nationwide showed a mean
ACT score of 21.4 (Ohio was not used). A survey of 500
Ohio scores showed a mean of 20.8. If the population
standard deviation for each case is 3, can we conclu
EXAM1STUDYGUIDE
Timeplot
Scatterplot
Likert Scale
4
Aggregate
5
Timeplot
Frequency Table
Bar Chart
Pie Chart
Area Principle
What principle
does this chart disregard?
Interquartile Range
Mean
Variance
Standard Deviation
Coefficient of Variation
Histogram
B
Derek Sanders
Brad Luen
Stat-S 301
Worked with: J.P. Cline, Drew Carberry, Lukas Kubon, and John Musselman
Assignment 11
1.
a.
Two Independent Samples, Mean
Ho = 1 2 > = 0
Ha = 1 2 < 0
Derek Sanders
Brad Luen
Stat-S 301
Worked with: Lukas Kubon and John Musselman
Assignment 2
1)
(b)
2
12
31
54
38
6
0
1
0
(c) Most Germans consume about 6.5-7.5 kilograms of c
Derek Sanders
Brad Luen
Stat-S 301
Worked with: Drew Carberry and Lukas Kubon
Assignment 1
1) False. Just because the number of deaths increased doesnt necessarily mean that
the publics health is the cause. The total population could have increased and
th
1 = P (A) + P (A0 )
Pn
i=1
x=
xi
P (A) = 1 P (A0 )
n
PN
i=1
=
P (A B) = P (A) + P (B)
xi
N
P (A B) = P (A) + P (B) P (A B)
Pn
i=1 (wi xi )
x= P
n
i=1 wi
Pn
2
x)2
n1
sP
P (A|B) =
P (A B)
P (B)
P (B|A) =
P (A B)
P (A)
i=1 (xi
s =
s=
n
i=1 (xi
x)2
n1
s2 =
S301 nal exam
Your name:
Time allowed: 1 hour 50 minutes
Please do not turn the page until you are instructed to do so.
Attempt all SIX questions. All six questions are of equal value.
You may refer to ONE double-sided sheet of legible notes, but no ot
Practice nal 2 solutions
S301
Spring 2014
1. (a) One measure of average happiness in a country is Gross National Happiness (GNH).
Fig. 1a is a graph of GNH in Bhutan from the 2012 World Happiness Report that made
statisticians unhappy. Draw a clearer grap
Practice nal 2
S301
Spring 2014
1. (a) One measure of average happiness in a country is Gross National Happiness (GNH).
Fig. 1a is a graph of GNH in Bhutan from the 2012 World Happiness Report that made
statisticians unhappy. Draw a clearer graph of the d
K310 nal exam
Your name:
Time allowed: 2 hours
Please do not turn the page until you are instructed to do so.
Attempt all SIX questions. All six questions are of equal value.
You may use a calculator, but no other electronic devices. Sharing of calcula
Practice nal 1 solutions
S301
Spring 2014
1. Table 1 gives the U.S. unemployment rate for each January since 2000.
Year
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
January unemployment
4.0%
4.2%
5.7%
5.8%
5.7%
5.3%
4.7%
4.6%
5.0%
7.7%
Practice nal 1
S301
Spring 2014
1. Table 1 gives the U.S. unemployment rate for each January since 2000.
Year
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
January unemployment
4.0%
4.2%
5.7%
5.8%
5.7%
5.3%
4.7%
4.6%
5.0%
7.7%
9.7%
9.0%
CLICKER QUESTION 1 Week 1 Check-In
HELLO, ARE YOU HERE TODAY?
(A) Hi, professor. YES! Im very excited to be here!
(B) Yes, Im here and ready to go.
(C) Yes, though Id rather not be.
(D) Yes.
1
Ch 1 An Introduction to Business Statistics (pp. 115)
Sec 1.2
Ch 4 Introduction to Probabilities (pp. 147181)
Sec 4.1 An Introduction to Probabilities (pp. 148155)
Terminology
Experiment The process of measuring or observing an activity for the
purpose of collecting data (e.g., rolling a six-sided die once)
Sample s
CLICKER QUESTION 1 Week 1 Check-In
HELLO, ARE YOU HERE TODAY?
(A) Hi, professor. YES! Im very excited to be here!
(B) Yes, Im here and ready to go.
(C) Yes, though Id rather not be.
(D) Yes.
1
Ch 2 Displaying Descriptive Statistics (pp. 2165)
Sec 2.1 The