EECS 3461 - Week 5B: Quantitative Analysis

Week 5B

When defining measures, what are some examples (EEUSIpIp)?

Effectiveness - number of errors made

Efficiency - time to complete tasks

Usability - measured using usability scales (SUS scale)

Satisfaction - enjoyment, comfort, user ratings

Improvement in perception - changes in user opinions about certain attributes

Improvement in performance - objective measure

Data collection is messy, with pre-process data, it is important to

be extremely careful, use manual checks and sanity checks on any manipulations

What are the steps for proper data analysis? (Analysis) (Hint: DCI)

Describe it, Compare it, Interpret it

In data analysis, what does ‘Describe it’ allow, and what is a caution?

It allows reasoning about implications of results and other to compare with their data.
A caution is ensuring that only relevant details are highlighted.

In data analysis, what does ‘Compare it’ allow, and what is a caution?

It allows for comparing the data with control or other experimental conditions.
A caution is ensuring that the conditions being compared are truly comparable.

In data analysis, what does ‘Interpret it’ allow, and what is a caution?

It allows for interpretation of the data, determining if it is plausible, and understanding why results turned out a certain way.
A caution is ensuring your interpretations are supported by the data and to avoid making assumptions beyond what the data shows.

In descriptive statistics, what information do we have?

Mean, Median, Mode, and Standard Deviation

In descriptive statistics, which method is commonly used to visualize how results are distributed?

Histogram

In descriptive statistics, which method is commonly used to visualize how multiple distributions compare?

Boxplot

Which descriptive graph allows us to compare different categories?

Bar graph

Which descriptive graph allows us to visualize how two variables are related?

Scatterplot

Which descriptive graph allows us to visualize how data changes over time (continuous data)?

Line graph

Which descriptive graph allows us to identify clusters of data points (volume of locations)?

Heat map