Statistics Review #1

6 friends played a game at an arcade.

Here is how many tickets they won:

1 9 3 7 9 1

What is the mean number of tickets they won?

• 3 tickets

• 4 tickets

• 5 tickets

• 6 tickets

This histogram shows some dogs weights in pounds.

Which of these statements is definitely true?

• This shows the weights of 6 dogs.

• There were 

  14 dogs that weigh 120 pounds.

• There are 4 dogs that weigh more than 140 pounds or more

• There are 

  6 dogs that weigh 70 pounds.

A survey asked 10 people how many hours they spent watching T.V. last night. 

0 | 3 | 3 | 4.5 | 2.5 | 2.5 | 3 | 0 | 4 | 2

Which dot plot can represents this data.

• 
• 
• 
• 

These dot plots show the number of junk emails Anders and Marcus have in their inbox.

Whose junk mail has a mean of 5?

• Anders

• Marcus

• Both

• Neither

What is the mean of this data set?

• 1

• 2

• 3

• 4

What is the MAD (Mean Absolute Deviation) of this set of data?

• 1

• 2

• 3

• 4

Complete this sentence:

The greater the spread, __________.

• the greater the mean.

• the lesser the mean

• the greater the MAD.

• the lessser the MAD

Which dot plot has a greater MAD?

• the first 5 games

• the last 5 games.

Which dot plot has a greater spread?

• the first 5 games

• the last 5 games.

Which dot plot has a smaller spread?

• the first 5 games

• the last 5 games.