*CO5124 LEC Quiz 2: Analytics and Sampling

What is an example of a statistical question? Select all that applies.

Descriptive statistics consists of using data that you have measured to form conclusions.

PivotTables cannot create cross-tabulations.

The following are true about the 'population' except:

Visualisation is a process of displaying data in a meaningful fashion, and provide insights for better decision making.

Sampling plan is the approach used to obtain samples from a population prior to any data collection activity.

You can easily add multiple variables in the fields of PivotTables to create different views of the data.

Cluster random sampling involves splitting subjects into mutually exclusive groups.

Which of the following statements are true for the reasons why we select a 'SAMPLE'?

Statistics is the method of finding evidence in a systematic way by collecting and analysing data to draw a conclusion.

Data table involves a process of calculating a value by performing a what-if-analysis on a given set of values.

Population refers to all items of interest for a particular decision or investigation.

Poorly designed visualisations can be misleading and can have a negative consequences to the readers.

The purpose of sampling is to obtain sufficient information to draw a valid inference about a population.

The sampling method used in Janses Coffee House example is simple random sampling.

Charts and graphs are often used interchangeably and therefore are the same.

Which of the following are true about purposive sampling? Select all that applies.

Stratified random sampling is a completely random method of selecting subjects.

Below are the examples of non-probability (bias) sampling except:

A variable is any quantity that can be measured and whose value varies through the population.

Goal seek allows a business to respond to alternative situations more quickly and effectively.

The surveys were distributed in-store and outside the stores at all 4 stores in Brisbane CBD. Define the population.

What-if-Analysis involves building hypothetical business cases to examine factors that will affect business outcomes.

Analytics is the study of the collection, analysis, interpretation, presentation and organisation of data.

What type of sampling is the one below?