Statistical Consulting on NKU’s Campus

CINSAM Lunch Seminar SeriesFeb. 19, 2014

How will you know if you have achieved

your research goals?And better yet…

How will you justify it and communicate it?

Burkardt Consulting CenterCo-DirectorsDr. Dave AgardDr. Joe Nolan

Assistant DirectorMary Lee Glore

Student AnalystsCraig Heard

Jessica FarmerKacie Kotnik

What is the BCC? We provide statistical and mathematical support for a wide variety of projects.

Our HistoryFounded in 2001 by Andy Long & Jim McKenney

Some past and current supporters of the center…• Tom Burkardt, 2003 Outstanding NKU alumnus

(B.S. in Mathematics and Computer Science)• College of Arts and Sciences• Department of Mathematics and Statistics• CINSAM

Our credentialsDirectors – PhD in Statistics

Assistant Director – M.S. in Applied Statistics

4 additional PhD-level statisticians in department

16 PhD-level mathematicians in department

Student Consultants – Junior or Senior majoring in statistics and/or mathematics

Some Past Clients• Over 130 different NKU

faculty/staff members, and departments/offices

• St. Elizabeth Medical Center

• N. Ky. Center for Educator Excellence

• Kentucky Center for Mathematics

• Kentucky Humanities Council

• Baptist Life Communities• NKU’s Pathways to Nursing• Leadership Scholars

Program

• Summit Hills Country Club• U.S. EPA• Covington Schools• Campbell County Schools• Cincinnati Public Schools• Kenton County Schools• Newport Schools• NKU students

• MSN and DNP students• Master-level students in

Education, and EdD students

• Senior Projects – Celebration of Student Research and Creativity

How can the BCC help you with your project?

Planning

Study Design (and its relationship to analysis)

Statistical/Mathematical Analysis

Interpretation of Results

Planning Brainstorming Interpreting statistical results found in related studies Revising Research Questions to best utilize statistical methods Determining the type of data that you will need to gather or

collect Determining how you will gather or collect that data• Existing Data (e.g., chart review)• Survey• Pre/Post Assessment• Experiment

(Statistical) Study DesignDetermining what variables need to be

measured/recordedDetermining appropriate data collection instrumentsSurvey designExperimental designDetermining sample size requirements

(power analysis)Establishing a timeline of data collectionAssist in developing and writing an evaluation plan

Data Management and Analyses

Help you to organize and manage your data (spreadsheets, etc.)

Answer questions regarding the use of statistical/mathematical software

Conduct analysesProduce graphs, tables, etc.

Interpretation of ResultsProvide written summaries of the statistical

analyses

Meet to discuss the results and how they may apply to the client’s field

Common Statistical Analyses

Investigating a single variable…• Categorical data:

o Frequency Table (counts and percentages)o Bar Grapho Confidence Interval for a Population Proportion

• Quantitative data:o Summary statistics (mean, median, standard deviation,

etc.)o Graphs: Histogram, Boxplot, Dotploto Confidence Interval for a Population Mean

Common Statistical Analyses

Comparing Two Groups with Quantitative Data…• Summary Statistics and Graphs• Two-Sample t-test• Paired t-test• Nonparametric Statistics:

o Mann-Whitney Testo Wilcoxon Signed Ranks Test

Summary Statistics

Group N MeanStandard Deviation Min Max Median

Treatment 1 12 42.58 6.63 29.00 57.00 41.00Treatment 2 12 46.75 4.42 39.00 59.00 46.50Total 24 44.67 7.63 29.00 59.00 41.00

Common Statistical Analyses

Comparing Three or More Groups with Quantitative Data…• Summary Statistics and Graphs• Analysis of Variance (ANOVA)• Repeated Measures ANOVA• Multiple Comparisons• Nonparametric Statistics: Kruskal-Wallis Test

Common Statistical AnalysesInvestigating Relationships…• Categorical Variables:

o Cross-tabulations and Bar Graphso Chi-Square Test or Fisher’s Exact Test

• Quantitative Variables:o Correlation and Scatterploto Linear Regression

• Other Relationships…o Multiple Regression (2 or more predictor variables)o Logistic Regression (modeling/predicting a binary response)o Ordinal Regression (modeling/predicting an ordinal response)

How Much do we Charge for our Services?

Meetings and/or analyses that can be completed in three hours or less are offered at no charge.

The fee for additional services (over and above the initial three hours) will be $40 per hour. An estimate of the time required can be provided following the initial meeting.

Writing a Grant Proposal? Consider including BCC for assistance with the statistical analysis?

How to Request our Assistance

By appointment only…

Visit our website, click on “Request our Services”, and fill out the online request form: www.nku.edu/~bcc

Send us an e-mail: bcc@nku.edu

Call us: 859-572-1325

Questions?