ST350 - Economics and Business Statistics

Welcome to my site for ST350. You'll find lecture notes as well as video links posted below. Note that the videos are broken down by the technology that you might use to solve the problem.

Lecture Slides

Lecture 1 - Class Orientation / Introduction to Statistics
Lecture 2 - Introduction to Statistics (continued) / Descriptive Statistics
Lecture 3 - Descriptive Statistics (measures of center)
Lecture 4 - Descriptive Statistics (measures of spread)
Lecture 5 - Probability (sample spaces, counting, additive property, complements)
Lecture 6 - Probability (multiplicative rule, conditional probability, Bayes' Rule)
Lecture 7 - Random Variables - Discrete / Binomial / Poisson / Hypergeometric
Lecture 8 - Random Variables - Normal / Uniform
EXAM 1 (Exam 1 Practice) (KEY)
Lecture 9 - Sampling Distributions
Lecture 10 - Central Limit Theorem, Sampling Distributions for Means and Proportions
Lecture 11 - Confidence Intervals for Means (z)
Lecture 12 - Confidence Intervals for Means (t) and Proportions
Lecture 13 - Hypothesis Testing - The 4 Steps and the z-test
Lecture 14 - Hypothesis Testing - t-test and proportion testing
Lecture 15 - Error, Alpha, Beta, Power
EXAM 2 (Exam 2 Practice) (KEY)
Lecture 16 - Two-Sample Comparison of Means
Lecture 17 - Matched Pairs and Two-Sample Comparison of Proportions
Lecture 18 - Inference for Categorical Data (Chi-Squared)
Lecture 19 - Simple Linear Regression, Linear Model Assumptions
Lecture 20 - Simple Linear Regression, Hypothesis Testing for Correlation and Regression
Lecture 21 - Multiple Regression Intro
Lecture 22 - Multiple Regression Example
Lecture 23 - Multiple Regression Practice
FINAL EXAM (Final Exam Practice) (KEY)

Video Listing

This video list corresponds to a course I taught in TX from a different textbook. As the semester goes along, I will work on this list to rearrange it according to our class progression. Videos in italics do NOT have any calculator steps provided. They are instructional videos (mini-lectures) based on that topic only.

You may also see some names in videos (Dr. Nic, Godbold, Tabbert). Those are 3 of my favorite YouTube statistics video authors. If you like a particular video style and want an organized list by each author, check out my instructional YouTube playlist. All these videos are listed there in order by author.

And this playlist contains videos made by me in response to student homework questions.

Data Collection

1.1 Qualitative vs Quantitative, Discrete vs Continuous Dr. Nic – https://youtu.be/lHCpYeFvTs0
1.1 Types of Data: Nominal, Ordinal, Interval, Ratio Dr. Nic – https://youtu.be/hZxnzfnt5v8
1.4 Sampling: Simple Random, Convenience, Systematic, Cluster, Stratified Dr. Nic – https://youtu.be/be9e-Q-jC-0
1.5 Sampling Error and Variation Dr. Nic – https://youtu.be/y3A0lUkpAko

Organizing and Summarizing Data

2.1/2.2 Understanding Statistical Graphs and when to use them Dr. Nic – https://youtu.be/rllw15xkmUU
2.1 Relative Frequency in Excel 2010 Tabbert – https://youtu.be/4tTiffMaxqw
2.1 Cumulative Frequency and Relative Frequency in Excel Tabbert – https://youtu.be/DrtChy0dBuk
2.2 Bar and Pie Charts StatCrunch Tabbert – https://youtu.be/9KkwOxQ9i5c
2.2 How to make a histogram using the TI-83/84 calculator – https://www.youtube.com/watch?v=By0qU-YYBJA
2.2 Creating a Histogram in Excel Tabbert – https://youtu.be/a3jYuTIYcNM
2.2 Creating a Histogram in StatCrunch Tabbert – https://youtu.be/4Nw1DULkUeQ
2.2 Creating a Histogram on a TI-83/84 Calculator with summary of frequencies Tabbert – https://youtu.be/RAz9JDP33vM
2.2 Creating a Histogram on a TI-83/84 calculator given raw data Tabbert – https://youtu.be/qCRcxEPVUEI

Numerically Summarizing Data

3.1 Summary Statistics: Mean, Median, Mode Dr. Nic – https://youtu.be/rAN6DBctgJ0
3.1 Mean Median Mode in Excel Tabbert – https://youtu.be/t3GG8Mx3Dzc
3.1 Mean and Median in StatCrunch Tabbert – https://youtu.be/F9hnJfS9_E0
3.1 Mean Median Mode TI-83/84 Calculator Tabbert – https://youtu.be/3mDYHqhUFvE
3.2 Understanding Standard Deviation, Range, Interquartile Range Dr. Nic – https://youtu.be/w5vQoJhrEDA
3.1/3.2 Using a TI-84 to Calculate the Mean and Standard Deviation of a Data Set (Sample) Godbold – https://youtu.be/gTOVeAf3HA4
3.1/3.2 Mean and Standard Deviation (and Variance) on TI-83/84 Calculator Tabbert – https://youtu.be/CC2_0gD3-SY
3.2 Standard Deviation and Variance, Population and Sample in Excel Tabbert – https://youtu.be/rLPVQhz6cB0
3.2 Standard Deviation and Variance, Population and Sample in StatCrunch Tabbert – https://youtu.be/q5kZP62plmA
3.4 Excel – find the z score of items in raw data Tabbert – https://youtu.be/fIOC6x3siP0
3.4 Calculating the z score of data on the TI-83/84 calculator Tabbert – https://youtu.be/ZecsXuxOKTU
3.4 StatCrunch z scores with raw data Tabbert – https://youtu.be/lNreCe1vFo8
3.4 Finding the Quartiles, IQR, and Upper/Lower Fences in Excel Tabbert – https://youtu.be/-o1PT3CfP3E
3.4 Using StatCrunch to find the Quartiles, IQR, and Upper/Lower Fences Tabbert – https://youtu.be/4PqOLdrZNYU
3.5 Using your TI-83/84 calculator to find the 5-number summary, IQR, boxplot Tabbert – https://youtu.be/8Hae-15FkUc

Describing the Relation Between Two Variables

4.1 Scatter Diagram and Linear Regression on the TI-83/84 Calculator – https://youtu.be/oCHk4xjnH7o
4.1 Finding the Correlation Coefficient and the Equation of the Best Fit Line Using the TI-84 (LinReg) Godbold – https://youtu.be/xau-Xdq0Pyk
4.1 Scatterplots in Excel, Regression Dr. Nic – https://youtu.be/Ohp1PpzrRhE
4.1 Scatterplot and Correlation Coefficient Excel Tabbert – https://youtu.be/hsbr_-QgZA0
4.1 Scatterplot and Correlation Coefficient TI-83/84 Tabbert – https://youtu.be/JqzCIDUcSjQ
4.1 Scatterplot and Correlation Coefficient StatCrunch Tabbert – https://youtu.be/xZr1bV2BSEo
4.2 Least Squares Linear Regression in Excel Tabbert – https://youtu.be/zYizl1HeqSU
4.2 Least Squares Regression Line on TI-83/84 Calculator Tabbert – https://youtu.be/sVeNrDLhgnI
4.2 Least Squares Linear Regression on StatCrunch Tabbert – https://youtu.be/BeYJzHzZTik

Probability

5.1 Understanding Probability Dr. Nic – https://youtu.be/XHmIRCw5CLY

Discrete Probability Distributions

6.1 Understanding Random Variables and Probability Distributions Dr. Nic – https://youtu.be/lHCpYeFvTs0
6.1 Discrete Random Variable using TI-83/84 Tabbert – https://youtu.be/cvUgnTCneyg
6.1 Discrete Random Variable using StatCrunch Tabbert – https://youtu.be/aD7xVb3aMmw
6.1 Discrete Random Variable using Excel Tabbert – https://youtu.be/i_z5QfCe3Cc
6.1 Find the Expected Value of a Game Using the TI-84 Calculator Godbold – https://youtu.be/HCAu3TuqyTQ
6.2 Understanding the Binomial Probability Distribution Dr. Nic – https://youtu.be/3EZbX2ftCUk
6.2 Finding Binomial Probabilities Using the TI-84 Godbold – https://youtu.be/eiDrsHDW1UA
6.2 Binomial Probability Distribution using Excel Part 1 Tabbert (you can ignore the first 4 minutes of the video… the link should jump to the 4-minute mark when you click it)- https://youtu.be/JsDgLF0Npww?t=231
6.2 Binomial Probability Distribution using Excel Part 2 Tabbert – https://youtu.be/KcywOUZDP8s
6.2 Binomial Probability Distribution using StatCrunch Tabbert – https://youtu.be/7yEyVh5uH5Y
6.2 Binomial Probability Distribution using TI-83/84 Tabbert – https://youtu.be/U34UnvbcXSg

The Normal Probability Distribution

7.1/7.2 Finding z-scores Given an Area Using the TI-84 Godbold – https://youtu.be/nd3FPSKSb7I
7.2 Finding the Area Under a Standard Normal Curve Using the TI-84 Godbold – https://youtu.be/SERkAlt1Wuk
7.2 Finding the Area Under a Standard Normal Curve using Excel Tabbert – https://youtu.be/AgYTc9krTUc
7.2 Finding the Area Under a Standard Normal Curve using StatCrunch Tabbert – https://youtu.be/WKpt-zqbChA
7.2 Finding the Area under a Standard Normal Curve using TI-83/84 Tabbert – https://youtu.be/yYpMkgB20C4
7.2 Using the TI-84 to Find Normal Probability Godbold – https://youtu.be/HKzZwX7oeDM
7.2 Normal Distribution, Using TI-84 – https://youtu.be/X9mXNfKoCH0
7.2 Finding a Data Value Given a Percentile Using the TI-84 – https://youtu.be/BB3nH6ygQKc
7.2 Find the Normal Value Given the Area TI-83/84 Tabbert – https://youtu.be/W7O26faqgYQ
7.2 Finding an x-Value Corresponding to a z-Score Using the TI-84 Godbold – https://youtu.be/Oqx1vBPs-EY
7.3 Assessing Normality TI-84 calculator Tabbert – https://youtu.be/2tx4tMiQpy4
7.3 Assessing Normality StatCrunch – https://youtu.be/DZk-qZZ7NLY
7.3 Assessing Normality StatCrunch Tabbert – https://youtu.be/HzacsY5RaN4

Sampling Distributions

8.1 Understanding the Central Limit Theorem Dr. Nic – https://youtu.be/_YOr_yYPytM
8.1 Using the Central Limit Theorem to Find Probabilities with the TI-84 Godbold – https://youtu.be/fxBIB1iEXUA

Estimating the Value of a Parameter

9.1 Understanding Confidence Intervals Dr. Nic – https://youtu.be/tFWsuO9f74o
9.1 Calculating Confidence Intervals for a Proportion using a formula Dr. Nic – https://youtu.be/OkR3PkT15uM
9.1 Using the TI-84 to Find a Confidence Interval for a Population Proportion (1-PropZInt) Godbold – https://youtu.be/tM6fpZfVUqY
9.1 Confidence Interval for Proportion TI-84 Tabbert – https://youtu.be/OVc5BCa0UvQ
9.1 Confidence Interval for a Proportion StatCrunch Tabbert – https://youtu.be/7wGg_psi1R4
9.1 How to find the confidence interval of the proportion in the TI-84 calculator – https://youtu.be/Yj9cPzq4ZDU
9.1 Estimating Population Proportion Excel Tabbert – https://youtu.be/qDaokYhySGY
9.1 Estimating Sample Size Needed for a Mean Excel Tabbert – https://youtu.be/qDaokYhySGY?t=408
9.2 Calculating the Confidence Interval for a Mean Dr. Nic – https://youtu.be/s4SRdaTycaw
9.2 Using the TI-84 to Find a Confidence Interval for a Population Mean (ZInterval and TInterval) Godbold – https://youtu.be/H3uU-Tx2Yq0
9.2 Confidence Interval for a Mean using Excel Dr. Nic – https://youtu.be/aKAXduMRifY
9.2 Confidence Interval for a Mean using Excel Tabbert – https://youtu.be/lXTHJXTDH8o
9.2 Confidence Interval for a Mean using TI-83/84 calculator Tabbert – https://youtu.be/gR8pHFZ4pYw
9.2 Confidence Interval for a Mean using StatCrunch Tabbert – https://youtu.be/xIZtagg82qQ

Hypothesis Tests Regarding a Parameter

10.1 The Basics of Hypothesis Testing using Difference of Two Means as an Example Dr. Nic – https://youtu.be/0zZYBALbZgg
10.2 Understanding the P-value Dr. Nic – https://youtu.be/eyknGvncKLw
10.2 Hypothesis Testing for a Population Proportion in The TI-84 (1-PropZTest) Godbold – https://youtu.be/dakbJs36t3M
10.2 Hypothesis Testing for a Population Proportion in Excel Tabbert – https://youtu.be/GlzFtuGQjzM
10.2 Hypothesis Testing for a Population Proportion in TI-83/84 Tabbert https://youtu.be/Y5wK1zHQ_OI
10.2 Hypothesis Testing for a Population Proportion in StatCrunch Tabbert – https://youtu.be/395_bVBrTf8
10.3 Hypothesis Testing Population Mean – TI-83/84 Calculator Tabbert – https://youtu.be/StpX5_AHKSs
10.3 Hypothesis Testing Population Mean – Excel Tabbert – https://youtu.be/eAsJKGX0T38
10.3 Hypothesis Testing Population Mean – StatCrunch Tabbert – https://youtu.be/QaNMv5fFDFg
10.3 Hypothesis Testing for a Mean Using a TI-84 (ZTest and TTest) Godbold – https://youtu.be/m69HQJSP5Nw
10.3 Hypothesis test (t-test) for a mean in Excel Dr. Nic – https://youtu.be/Y3mGoW5w28c
10.4 Choosing which statistical test to use Dr. Nic – https://youtu.be/rulIUAN0U3w

Inferences on Two Samples

11.2/3 Paired Samples and Independent Samples: How to know the difference Dr. Nic – https://youtu.be/-6vDjGR41YM
11.2 Hypothesis Test for the Difference Between Two Dependent Population Means (Paired Data) using StatCrunch – https://youtu.be/Pnd9aSNk7yQ
11.2 Hypothesis Testing for the Difference Between Two Dependent Means Using the TI-84 (T-Test) Godbold – https://youtu.be/QFjWGqCfjzo
11.2 T-test for difference of two means using Excel Dr. Nic – https://youtu.be/Ko_WlL1oF1o
11.3 Hypothesis Testing for Two Independent Means Using a TI-84 (2-SampZTest and 2-SampTTest) Godbold – https://youtu.be/MrxbGVmA0I4
11.3 Two Sample t-Tests and Confidence Intervals TI-84 – https://youtu.be/hLuc-auSln4
11.3 Two means t-test in Excel Dr. Nic – https://youtu.be/t2ryZyytW5w