Presentation on theme: "Targeting Grade C Handling Data Unit 1 Two-Way Tables GCSE Mathematics."— Presentation transcript:
Targeting Grade C Handling Data Unit 1 Two-Way Tables GCSE Mathematics
TOP: Review adding and subtracting Practice 1: Completing two-way tables Practice 2: Reading information from two-way tables Practice 3: Finding probabilities from two-way tables TAIL Can you… Fill in a two-way table Answer questions from a two-way table Find probabilities from a two-way table Try a test If not you need
Practice 1:Complete the following tables 1)Students are asked if they prefer to go swimming or to the gym. 2) Some people are asked about their favourite outdoor sport. Lesson SwimmingGymTotal Boys 2545 Girls Total 64100 HikingCanoeingClimbingTotal Under 15s42150 15 – 303047100 Over 303015 Total75300
Practice 2:Copy and complete the following two-way table about ways of eating potato and then answer the questions. 1)How many boys liked mash? 2)How many teachers preferred new potatoes? 3)How many girls were asked? 4)Out of the people who liked chips, how many were boys? Lesson NewChipsMashTotal Boys34100 Girls2537 Teachers122250 Total104250
Practice 3: For the following two-way table answer the questions on probability. A person is picked at random from the sample. Lesson NewChipsMashTotal Boys155134100 Girls253738100 Teachers12162250 Total5210494250 1)What is the probability the person picked is a boy? 2)What is the probability the person liked mash? 3)What is the probability the person was a teacher who preferred new potatoes? 4)What is the probability that, out of the girls, the person liked chips? 5)Out of the people who liked chips, what is the probability the person was a boy?
TAIL For the following table, copy and complete it, then answer the questions about types of coffee bought. Next Coffee is sold in three types and in three weights. a)How many people bought 100g of powdered coffee? b)How many people bought ground coffee? c)Out of the packets weighing 200g, what is the probability the packet bought contained granules? 100g200g300gTotal Ground 50 120 Powder803526 Granules4045 Total135 400 Are you ready for the answers ?