core maths 5.0 / 5 MathematicsStatistics, averages and distributionsASAQA Created by: CamillaCumminsCreated on: 10-01-17 19:58 what is the formula for a stratified sample? Number in the group/ total population x sample size 1 of 18 what is the mode? The most common number 2 of 18 What is the median? The middle value when the values are in size order 3 of 18 What is the mean? The total of all the items/number of items 4 of 18 What is the range? The difference between the highest and lowest value 5 of 18 What is qualitative data? Data that uses words 6 of 18 What is quantitative data? Data that uses numbers 7 of 18 What is discrete data? Data that can only take certain exact values (e.g. shoe size) 8 of 18 What is continuous data? Data that can be taken at any value in a range (e.g. foot length, you will always be able to measure it more accurately) 9 of 18 What is the formula for the lower quartile? (n+1)/4 (n being the total number of values) 10 of 18 What is the formula for the upper quartile? 3(n+1)/4 (n being the total number of values) 11 of 18 What is the formula for frequency density? frequency/class width 12 of 18 What is the modal class? The class in a grouped frequency table that has the highest frequency 13 of 18 Name one advantage and one disadvantage of using the range Advantage: shows how spread the data is or easy to calculate Disadvantage: only uses the first and last pieces of data 14 of 18 Name one advantage and one disadvantage of the interquartile range Advantage: Not influenced by extreme values Disadvantage: Doesn't use all the data 15 of 18 Name one advantage of using standard deviation Advantage: uses all the pieces of data Disadvantage: complicated to calculate/time consuming to calculate 16 of 18 What is a cluster sample? When a group is selected at random and data is collected from that 'cluster' 17 of 18 What is quota sampling? When the sampler selects a specific number of people from a stratum 18 of 18

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