The video tutorial explains how to choose the correct statistical test by considering data types, sample sizes, and the purpose of analysis. It covers seven common tests involving means, proportions, and relationships, providing examples for each. The tutorial emphasizes understanding nominal and interval/ratio data, the number of samples, and the analysis's purpose to select the appropriate test. It also highlights the differences between chi-square tests and regression analysis.

What are the three key questions to consider when choosing a statistical test?

• Level of measurement, number of samples, purpose of analysis

• Type of data, sample size, data source

• Data collection method, analysis software, hypothesis

• Researcher's preference, data format, statistical software

Which type of data is also known as categorical or qualitative?

• Interval/ratio data

• Nominal data

• Ordinal data

• Quantitative data

What is the most common summary value for interval/ratio data?

• Range

• Median

• Mean

• Mode

When comparing two different groups, such as men and women, how many samples are involved?

• Four samples

• One sample

• Two samples

• Three samples

If you have one sample with two variables, what kind of test might you use?

• Difference of two means

• Chi-squared test for independence

• Test for a mean

• Regression analysis

What is the purpose of a chi-square test for independence?

• To compare two means

• To analyze variance

• To test a proportion

• To explore the relationship between two variables

In the example of Helen's choconutties, what test is used to compare the weight of nuts in packets against a given value?

• Chi-squared test

• Test for a mean

• Regression analysis

• Test for a proportion

What statistical test is appropriate when comparing the average sales figures for days with and without stickers?

• Difference of two means independent samples

• Test for a proportion

• Chi-squared test for independence

• Regression analysis

Which test would you use to determine if there is a relationship between daily temperature and sales?

• Chi-squared test for independence

• Test for a mean

• Regression analysis

• Difference of two proportions

In the example of chocolate preference, what test is used to explore the relationship between gender and chocolate type preference?

• Regression analysis

• Test for a mean

• Difference of two means

• Chi-squared test for independence