📉 Data Analysis & Statistics
Master the fundamentals of data analysis and statistical interpretation. This quiz covers scatter plots, lines of best fit, measures of central tendency, correlation vs. causation, and critical thinking about data representations. What you'll learn: - Create and interpret scatter plots and lines of best fit - Calculate mean, median, mode, and range for datasets - Distinguish between correlation and causation - Identify misleading or biased data representations - Recognize and infer trends from statistical data
Questions in this quiz
Answers hidden — play to find out.
- Question 1
A scatter plot shows the relationship between hours studied and test scores for 20 students. The points form a clear upward pattern from left to right. Which statement best describes this relationship?
- Question 2
If two variables have a strong positive correlation, it always means that one variable causes the other.
- Question 3
Given the dataset: 5, 7, 9, 11, 13, what is the median?
- Question 4
Which of the following is a line of best fit?
- Question 5
For the dataset 3, 5, 7, 7, 9, 11, what is the mode?
- Question 6
The range of a dataset is calculated by finding the difference between the maximum and minimum values.
- Question 7
A bar graph shows sales data over 12 months, but the y-axis starts at 50 instead of 0. Why might this be misleading?
- Question 8
Calculate the mean (average) of the dataset: 10, 15, 20, 25.
- Question 9
A scatter plot shows a weak correlation between advertising spending and product sales. Which conclusion is most appropriate?
- Question 10
If a line of best fit has a negative slope, it indicates a negative correlation between the two variables.
- Question 11
Which measure of central tendency is most useful when a dataset has extreme outliers that are very different from the other values?
- Question 12
In a weighted average scenario, Student A's test score of 85 on a quiz counts as 20% of the final grade, and Student A's project score of 92 counts as 80%. What is Student A's weighted average?
- Question 13
A scatter plot has points scattered randomly with no clear pattern. What does this suggest about the relationship between the two variables?
- Question 14
A pie chart showing the distribution of time spent on different activities is a type of categorical data visualization.
- Question 15
Which of the following scenarios best demonstrates causation rather than just correlation?
- Question 16
A data analyst notices that as video game sales increase, literacy rates in a country decrease. What is the most likely explanation?
- Question 17
Which type of graph is best for showing how a quantity changes over continuous time?