Statistical Tests and Data Types

The video tutorial provides an overview of choosing the correct statistical test by considering data types, sample sizes, and analysis purposes. It explains nominal and interval/ratio data, discusses sample considerations, and outlines the purpose of analysis. The video includes examples of seven statistical tests, such as tests for means, proportions, and relationships, to help viewers understand their applications.

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 collection method

• Research hypothesis, data source, statistical software

• Data visualization, data cleaning, data transformation

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

• Interval/ratio data

• Nominal data

• Ordinal data

• Quantitative data

What statistical test is used for interval/ratio data?

• Test for a proportion

• ANOVA

• Chi-squared test

• Test for a mean

When comparing two different groups, such as men and women, what is the sample type?

• Two independent samples

• One sample with repeated measures

• One sample with two variables

• Matched pairs

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

• To test for a relationship between two categorical variables

• To assess the effect of an intervention

• To compare means between two groups

• To predict a continuous outcome

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

• Test for a proportion

• Chi-squared test

• Test for a mean

• Regression analysis

What test should Helen use to determine if the proportion of prize tickets in packets meets the expected 20%?

• ANOVA

• Test for a proportion

• Chi-squared test

• Test for a mean

Which test is appropriate for comparing the eating times of two different chocolate bars?

• Test for a proportion

• Difference of two means paired sample

• Chi-squared test

• Regression analysis

What statistical test is used to explore the relationship between sales and temperature?

• Chi-squared test

• Regression analysis

• Test for a mean

• ANOVA

How does Helen determine if there is a relationship between gender and chocolate preference?

• ANOVA

• Chi-squared test for independence

• Regression analysis

• Test for a mean