Two way table group work and probabilityPresentation Transcript
Entry Activity • Students in a school were asked if they had school dinners or packed lunches. • Their results are shown below. Boys Girls School dinners 24 16 Packed lunch 12 32Write down 9 facts that this table shows you.
Answers1. 24 boys have school diner2. 16 girls have school dinner3. 12 boys have packed lunch4. 32 girls have packed lunch5. 40(24 + 16) students have school dinner6. 44(12 + 32) have packed lunch7. 36(24 + 12) boys either have school dinners or packed lunch8. 48(16 + 32) girls either have school dinner or packed lunch9. 84(24 + 16 + 12 + 32) students have either school dinners or packed lunch
Tuesday, 7th June, 2011Today I will learn to collect data and record in a two-way table. Level 5 Challenge: I will learn how to use two way tables to calculate probabilities Level 6Key Words• Two-way table• Data• Frequency
Practical task• Keeping the students in their groups, explain that their task is to collect data from• the whole class and record it.• Use the data collection sheets as shown below, or the students can design their own.• One student from each group is the ‘collector’, the rest of the group are the• ‘informers’. Each ‘collector’ goes from group to group collecting their data.
Now lets look at probability!What is the probability that girls like Maths?What is the probability that students in ourclass like Science?What is the probability that our class don’t likeEnglish?Now you make up some probabilities for theother two-way tables and record on yourgroup poster!
Homework1. Design a two way table of your choice.2. Collect information from at least 30 people3. Record your results in your two way table4. Write some probability questions about your data collected EG: Boys Girls School dinners 2 16 Packed lunch 8 5 What is the probability that girls have school dinners? What is the probability that children have packed lunches? What is the probability that boys don’t have school dinners?