Let's break down the quiz items one by one and provide the correct terms:

1. These are illustrations that communicate numerical data visually: This describes graphs or charts. Common examples include bar charts, pie charts, and histograms.

2. In a list of numbers, it is the value that occurs most frequently: This is known as the mode.

3. It is a type of distribution that forms a bell-shaped curve that is symmetric about a vertical line through the mean of the data: This is describing the normal distribution or Gaussian distribution.

4. It is a method of determining the relationship between a paired data: This refers to correlation or regression analysis.

5. It determines the strength of a linear relationship between two variables: This is commonly measured by the correlation coefficient (often denoted as $r$).

Would you like further details or clarification on any of these points? Here are 5 related questions for expanding your knowledge:

1. What are some different types of charts used for data visualization?
2. How do you calculate the mode in a data set?
3. What are some characteristics of a normal distribution?
4. What is the difference between correlation and regression analysis?
5. How is the correlation coefficient interpreted?

Tip: When interpreting a correlation coefficient, values close to +1 or -1 indicate a strong relationship, while values near 0 indicate a weak relationship.