To solve problems involving mean averages Year 5

To solve problems involving mean averages. Year 5 - Statistics (GDS) Lesson 3

LI: To solve problems involving mean averages. I can add up all the numbers in my data set. I can divide my total by the amount of numbers in the data set. I can use the correct units for my final answer. Vocabulary Mean Average Total Divide Add Data set Recap from the last lesson… Look at the skills and then quickly check your understanding. Previously, we looked at how we can read and interpret line graphs. . . Let’s quickly recap the rules of reading line graphs. . . - Line graphs are used to help us measure certain events over a certain period of time. For example, we can measure the amount of milk drunk in one month by a baby. The time which in this case would be weeks is typically written along the x axis. The event (the amount of milk the baby has drunk) will be measured along side the y axis. We can then read the graph by looking at the x axis and y axis and draw conclusions. For example in two weeks (x axis) the baby might have drunk 3500 ml of milk (y axis).

Learning check: You do…. Answers: 1. 17 minutes 2. 26 cm 3. 3 minutes QUESTIONS: The following graph shows the height of the water during a bath. 1. Jamie gets out the bath before he unplugs the drain. How long was he in the bath for? 2. What was the maximum height of the water? 3. How long did it take for all the water to drain away? If you are struggling or didn’t get the correct answers, rewatch the video above which breaks down how to read line graphs. If you feel confident, carry on with the slides.

LI: To solve problems involving mean averages. I can add up all the numbers in my data set. I can divide my total by the amount of numbers in the data set. I can use the correct units for my final answer. Vocabulary Mean Average Total Divide Add Data set Calculate the mean of the following set of numbers: a) 45, 56, 53, 56, 24, b) 23, 55, 24, 53, 43, 34 c) 120, 124, 120, 129, 127 Teacher Example… Fluency - calculating the mean. . .

LI: To solve problems involving mean averages. I can add up all the numbers in my data set. I can divide my total by the amount of numbers in the data set. I can use the correct units for my final answer. Vocabulary Mean Average Total Divide Add Data set Calculate the mean averages of the following set of numbers: a) 23, 45, 53, 54 b) 123, 122, 125, 128, 127 c) 52. 2, 56. 3, 50. 5, 49 If you are struggling with these questions, feel free to go back and watch the video one more time. Learning check: You do…. Answers: a) 43. 75 b) 125 c) 52

LI: To solve problems involving mean averages. I can add up all the numbers in my data set. I can divide my total by the amount of numbers in the data set. I can use the correct units for my final answer. Vocabulary Mean Average Total Divide Add Data set Teacher Example… Application and reasoning questions. . . Application: The mean of the following numbers is 6. What is the missing number? Reasoning: Diego has is working out the mean of the numbers: 5, 9, 6, 2, 8. He argues that in order to find the mean of these numbers the total must be a multiple of 5. Do you agree? Explain your answer. Watch the video to see how we can solve these problems

LI: To solve problems involving mean averages. I can add up all the numbers in my data set. I can divide my total by the amount of numbers in the data set. I can use the correct units for my final answer. Vocabulary Mean Average Total Divide Add Data set Learning check: You do…. Q 1 Three friends are trying to find their mean weight. Colton is 5. 2 kg lighter than Bryce is 1. 4 kg heavier than Jovan who is 75. 8 kg. What is their mean weight? Q 2 Megan goes on a walking holiday and records the distances she walked below: She argues that her mean average walking distance for the first four days is more than 15 km. Is she correct? Explain your answer.

LI: To solve problems involving mean averages. I can add up all the numbers in my data set. I can divide my total by the amount of numbers in the data set. I can use the correct units for my final answer. Q 1 Three friends are trying to find their mean weight. Colton is 5. 2 kg lighter than Bryce is 1. 4 kg heavier than Jovan who is 75. 8 kg. What is their mean weight? 77. 2 + 75. 8 + 72 = 228 divided by 3 = 75 kg Q 2 Megan goes on a walking holiday and records the distances she walked below: She argues that her mean average walking distance for the first four days is more than 15 km. Is she correct? Explain your answer. Megan is incorrect. She has not included her decimals in her answer. The actual answer is 15. 75 km. Vocabulary Mean Average Total Divide Add Data set Learning check: Answers:

Well done! Now complete the worksheet below on the google doc. You can either write the answers on the google doc, or write it out on paper and send a picture of your work to your teacher. https: //docs. google. com/document/d/1 yn. Pi. V 0 fl. YZ_mt. COe. Clos. NFg. Rkq. Trub 2 MKl 9 PJMpjg. NA/edit Remember to log onto maths whizz as well this week!