Statistics Review

This list shows the number of text messages 5 friends sent last week:  15, 17, 19, 20, 21.  The most appropriate measure of center for this data is the --- 

• The mean because all the numbers are close to one another in value.  
• The median because all the numbers are close to one another in value. 
• The mean because 15 text messages is much lower than the other numbers.
• The median because 15 text messages is much lower than the other numbers.

In which of the following situations would the mean be an appropriate measure of central tendency?
I. When the data set contains no outliers
II. When using categorical data
III. When an exact average is needed
IV. When the middle value is needed 

• II and III only
• I and III only
• I, III, and IV only
• All of the above 

How old is my neighbor's cat?  

• Statistical Question
• Not a statistical question

How old is each cat at the shelter?

• Statistical Question
• Not a Statistical Question

In a recent survey, 27 out of 60 cat owners adopted their cat at a shelter.  If there are 160 owners, how many did not adopt there cat at a shelter?

• 72
• 88
• 48
• 52

Carl decided to survey the fans at the Georgia Tech football game to see if they liked football. The survey question is ______

• Biased - Convenience 
• Biased - Voluntary Response 
• Nonbiased - Simple Random
• Nonbiased - Systematic Random Sample

Which measure of center does the outlier mostly affect?

• Mean
• Median
• Mode
• Range

Max wants to know what NGMS students like to listen to.  He asked every 5th student who went into the cafeteria to name their favorite type of music.  The sample is ________.

• Biased - Convenience Sample
• Biased - Voluntary Response
• Nonbiased - Random Sample
• Nonbiased - Systematic Random Sample

A number cube is rolled.  What is the probability that the number rolled is greater than 2 and even?

• 1/2
• 1/3
• 2/3
• 5/6

A radio station asks listeners to call in if they think the Falcons will win the Super Bowl this year.  The survey is 

• Biased - Convenience 
• Biased - Voluntary Response
• Nonbiased - Random Sample
• Nonbiased - Systematic Random Sample