Math 8 Statistics Review

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

What type of correlation (association)?
The outside temperature and the amount of layers you wear. 

• Positive correlation
• Negative correlation
• No correlation
• All of the above

The number of siblings you have and your weight. 

• Positive correlation
• Negative correlation
• No correlation
• All of the above

As x increases, y increases

• correlation coefficient
• causation
• positive correlation
• negative correlation

What is a trend line that shows the most accurate relationship between x and y and is is very close to most of the data points?

• linear regression
• no correlation
• trend line
• line of best fit

Which scatter plot shows a linear relationship between x and y?

• Graph A
• Graph B
• Graph C
• Graph D

What is the correlation?

• Negative correlation
• No correlation
• Positive correlation
• All of the above

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

What is the relative frequency (to the nearest percent) of boys among those who cannot bike to school? 

• 4%
• 14%
• 13%
• 29%