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Welcome to… The Mean Tutorial!

One way to calculate the average. Welcome to… The Mean Tutorial!. Click on the arrow to begin…. Q. Why do you need to calculate the mean?. A. To work out the average from a list of data.

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Welcome to… The Mean Tutorial!

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  1. One way to calculate the average Welcome to… The Mean Tutorial! Click on the arrow to begin…

  2. Q. Why do you need to calculate the mean? A. To work out the average from a list of data. A. It is the sum of all scores divided by the number of scores. Q. How do you calculate the mean? mean = sum of all scores number of scores Remember this formula…

  3. Example What is the average height of a year 5 child? 6 children were measured and their heights were recorded… To work out the average height you find the mean… 120+105+127+126+118+130 = 726 = 121cm 6 6 120cm, 105cm, 127cm, 126cm, 118cm, 130cm The average height of a year 5 child is 121cm. mean = sum of all scores number of scores

  4. Have a go. Click on the stars! Throwing challenge Egg carrying race Jelly babies contest Click on the arrow when you have tried all of these…

  5. Some children took part in a throwing challenge to see who was the furthest thrower. Each competitor had 3 tries and their average score was used. Throwing challenge Ben’s three tries… Challenge! What will Ben’s mean average throwing score be? Use your formula… Click when you have an answer.

  6. Formula… mean = sum of all scores number of scores Throwing challenge 5m 37cm + 4m 20cm + 5m 55cm = 15m 12cm = … 3 3 Ben's mean throwing score is 5m 4cm. Were you right? Click on the button to continue…

  7. 8 children loved nothing better than to grab an egg and spoon and race to see who can carry theirs the furthest. Egg carrying race The results… Challenge! What is the mean average of the race times? Use your formula… Click when you have an answer.

  8. Remember: use the same units if this makes adding up easier Formula… mean = sum of all scores number of scores Egg carrying race 35 secs + 1 min 2 secs + 55 secs + 40 secs + 45 secs + 50 secs + 55 secs + 1 min 30 secs = 8 432 secs = … 8 The mean average of the race times is 54 seconds. Were you right? Click on the button to continue…

  9. 12 children are huge jelly-baby eaters. They decided to find out what is the average number of jelly-babies they could eat in one minute between them. Jelly babies contest The results… Challenge! Calculate the mean average number of jelly-babies they could eat as a group. Use your formula… Click when you have an answer.

  10. Remember: use a calculator & round down to the nearest whole number Formula… mean = sum of all scores number of scores Jelly babies contest 11 + 17 + 22 + 27 + 16 + 14 + 23 + 11 + 15 + 14 + 21 + 20 = 12 211 = … 11 The mean average of jelly babies eaten is 17 whole babies. Were you right? Click on the button to continue…

  11. Well done! You have now mastered how to use the mean to work out an average.

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