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# Data Summaries resources

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### 3. Teach Yourself Worksheets (4)

Calculating the Mean, Median and Mode (Worksheet)
This teach yourself worksheet explains how to calculate the mean, median and mode, which are the most commonly used measures of central tendancy or average for a data set.
Calculating the POPULATION Variance and Standard Deviation (Workseet)
This teach yourself worksheet explains how to calculate the POPULATION variance and standard deviation. Note: this worksheet uses a divisor of "n" which assumes you have data on every member of the population. If you only have a sample then use the divisor "n-1" instead.
Estimating the Mean from Grouped Data (Worksheet)
This teach yourself worksheet explains how to estimate the mean from a grouped frequency table. For example, in a survey you may have asked participants to indicate an age range rather than asking their actual age.
Estimating the POPULATION Variance and Standard Deviation from Grouped Data (Worksheet)
This teach yourself worksheet explains how to estimate the POPULATION variance and standard deviation from grouped frequency data. For example, in a survey you may have asked participants to indicate an age range rather than asking their actual age. Note: this worksheet uses a divisor of "n" which assumes you have data on every member of the population. If you only have a sample then use the divisor "n-1" instead.

### 4. Tests and Quizzes (1)

5 questions. 1. Choosing whether given random variables are qualitative or quantitative. 2. Deciding whether or not three sampling methods are simple random sampling, stratified sampling, systematic or judgemental sampling. Also whether or not the method of selection is random, quasi-random or non-random.3. Given a table of the number of days in which sales were between £x thousands and £(x+1) thousands find the relative percentage frequencies of these volume of sales.4. Given random set of data (between 13 and 23 numbers all less than 100), find their stem-and-leaf plot. 5. Given sample data find mean, standard deviation, median, interquartile range. Numbas resources have been made available under a Creative Commons licence by the School of Mathematics & Statistics at Newcastle University.

### 7. Community Project (6)

1 Introduction to Statistical Methods (Workshop SOURCE)
A PowerPoint workshop which covers some basic topics such as data types and the research study process. This has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University under a Creative Commons licence CC-BY-SA and reviewed by Ellen Marshall, University of Sheffield. The zip file contains the source file and the associated statstutor metadata spreadsheet.
3 Descriptive statistics (Workshop SOURCE)
This PowerPoint workshop covers: types of data; tables; charts; measures of middle value; measures of spread; and choice of table, chart and measure. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University under a Creative Commons licence CC-BY-SA and reviewed by Ellen Marshall, University of Sheffield. The zip file contains an associated Activities sheet, the source file and the associated statstutor metadata spreadsheet.
4 Excel Pivot tables (Workshop SOURCE)
This PowerPoint workshop is an introduction to Excel 2010, PivotTables and Excel functions. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University under a Creative Commons licence CC-BY-SA and reviewed by Ellen Marshall, University of Sheffield. The zip file contains an associated data file, the source file and the associated statstutor metadata spreadsheet.
8 Parametric Testing (Workshop SOURCE)
This PowerPoint workshop provides an introduction to parametric testing using SPSS. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University under a Creative Commons licence CC-BY-SA and reviewed by Ellen Marshall, University of Sheffield. The zip file contains an associated data file, the source file and the associated statstutor metadata spreadsheet.
Measures of middle value SOURCE
A Quick Reference worksheet on measures of middle value. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University under a Creative Commons licence CC-BY-SA and reviewed by Ellen Marshall, University of Sheffield. The zip file contains the source file and the associated statstutor metadata spreadsheet.
A Quick Reference worksheet on measures of spread. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University under a Creative Commons licence CC-BY-SA and reviewed by Ellen Marshall, University of Sheffield. The zip file contains the source file and the associated statstutor metadata spreadsheet.

### 10. Workshops (4)

1 Introduction to Statistical Methods (Workshop)
A PowerPoint workshop which covers some basic topics such as data types and the research study process. This has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University and reviewed by Ellen Marshall, University of Sheffield.
3 Descriptive statistics (Workshop)
This PowerPoint workshop covers: types of data; tables; charts; measures of middle value; measures of spread; and choice of table, chart and measure. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University and reviewed by Ellen Marshall, University of Sheffield. It includes an Activities sheet.
4 Excel Pivot tables (Workshop)
This PowerPoint workshop is an introduction to Excel 2010, PivotTables and Excel functions. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University and reviewed by Ellen Marshall, University of Sheffield. It includes a data file for use in the workshop.
8 Parametric testing (Workshop)
This PowerPoint workshop provides an introduction to parametric testing using SPSS. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University and reviewed by Ellen Marshall, University of Sheffield. The zip file contains an associated data file.

### Quick reference worksheet (2)

Measures of middle value
A Quick Reference worksheet on measures of middle value. This resource has been contributed to the statstutor Community Project by Peter Samuels, Birmingham City University and reviewed by Ellen Marshall, University of Sheffield.