Survey

Document related concepts

Transcript

WALT: find the mean, median and mode from a frequency table (Grade D/C) Can you guess the English version of these mathematical words? frecuenci modd a moyen terme número durchschnitt airmheán 10 Quick Questions Reviewing Higher Topics -In Pairs! Question 1... Write the prime factors of 160. Question 2... Order the following from smallest to largest. 0 8 ,6 −1 , 1 4 , 16 1 2 Question 3... Given that 6.3 × 2.7 = 17.01 work out: 63 × 27 b) 630 × 2.7 a) Question 4... Write 1.25 × 10−7 as a regular number. Question 5... 2 3 Work out the value of 8 Question 6... Expand + 3 2 + 3 . Question 7... Factorise 2 + 5 + 6. Question 8... Factorise 2 − 64. Question 9... Change the subject of this formula to . 4 + = 2 Question 10... Write down all the possible integer values of in these inequalities. −3 < ≤ 5 This lesson… We are going to review how to analyse data using a frequency table. To succeed: you will know how to find the mean and mode from a grouped frequency table. To excel: you will know how to find the class that contains the median from a grouped frequency table. Challenge: to use a frequency table to present the data in a cumulative frequency diagram. It’s the year 2033… …and how exciting! It’s our 20year 11S-Ma2 class reunion! Many of you have careers, spouses and childrenwhich means a lot of data for me! Being the extremely cool mathematician that I am I decide to analyse some of this data. First, I want to find out the average number of children that my students have had. Next, I would like to find out the average age of the children. What makes analysing this data more difficult? Try it! Each of you has a number 1-3. You must group yourself so you have 1 of each number. Together, try and answer the exam question on finding averages from a frequency table. Question 1- 3 marks Question 2- 5 marks Try it yourself…