Averages from Tables Things to remember: The mode is the one with the highest frequency. To calculate the median, find where the middle value is located by using . The mean is given by , ie. the total frequency x midpoint divided by the total frequency. Always look back at the data to check your answer looks realistic. Questions: 1. Zach has 10 CDs. The gives some information about the number of tracks on each CD. Number of tracks Frequency 11 1 12 3 13 0 14 2 15 4 (a) Write down the mode. ........................................................... (1) (b) Work out the mean. ........................................................... (3) (Total 4 marks) 2. 30 adults took part in a survey. They were each asked how much money they spent on lottery tickets last week. The table shows the results of the survey. Money (£) Frequency 0 5 2 16 4 6 20 2 30 1 Work out the mean amount of money the 30 adults spent on lottery tickets. £ ........................................................... (Total 3 marks) 3. Josh asked 30 adults how many cups of coffee they each drank yesterday. The shows his results.
Averages from Tables Things to remember: The mode is the one with the highest frequency. To calculate the median, find where the middle value is located by using . The mean is given by , ie. the total frequency x midpoint divided by the total frequency. Always look back at the data to check your answer looks realistic. Questions: 1. Zach has 10 CDs. The gives some information about the number of tracks on each CD. Number of tracks Frequency 11 1 12 3 13 0 14 2 15 4 (a) Write down the mode. ........................................................... (1) (b) Work out the mean. ........................................................... (3) (Total 4 marks) 2. 30 adults took part in a survey. They were each asked how much money they spent on lottery tickets last week. The table shows the results of the survey. Money (£) Frequency 0 5 2 16 4 6 20 2 30 1 Work out the mean amount of money the 30 adults spent on lottery tickets. £ ........................................................... (Total 3 marks) 3. Josh asked 30 adults how many cups of coffee they each drank yesterday. The shows his results.
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