Finding Mean with Frequency of Numbers

When finding the mean from a frequency table, we can remember "MAD" to help us. What does it stand for?

• The Madness - an old band in the 70's & 80's

• Multiply. Add. Divide.

What letter stands for "Frequency" in a frequency table?

• F

• R

• E

• Q

• U

What letter stands for our "Variable" (the thing we are measuring) in a Frequency Table?

• V

• a

• r

• x

The first step is to multiply our variable (x) by the frequency (f) to form xf. Where does xf go?

• 
• 
• 

Read at this example question. The mean from this table is...

• The average number of sweets per person

• The average number of sweets per packet

• The total number of sweets

• The average number of sweets per row

Read at this example question. The mean from this table is...

• The average number of games played per season

• The average number of goals conceded per game

• The average number of goals the team scored per game

• The average number of goals Robbie scored per game

Read at this example question. The mean from this table is...

• the average number of tickets won per game

• the average number of tickets won per person

• the average number of tickets won per row

Read at this example question. The mean from this table is...

• The average number of cats per class

• The total number of cats in Catland

• The average number of cats per child

• Whose cat has the meanest claws

Read at this example question. The mean from this table is...

• The average number of times the internet has been accessed per day

• The average number of times the internet has been accessed per household

• The average number of internet devices per household

• The total number of memes seen by Year 9 in 2020.

To calculate the mean, what goes in the column on the right? (Hint: M.A.D)

• Goals + number of matches

• Goals x number of matches

• Goals - number of matches