edexcel mathmatics higher revision - statistic 1 0.0 / 5 ? MathematicsData HandlingGCSEEdexcel Created by: Fseacombe **Created on: 30-05-13 17:20 what does the notation 1020 mean? it means all values between 10 & 20 - not including 10 but including 20 1 of 21 what can grouped data be shown on? a histogram or a frequency polygon 2 of 21 what is a histogram used for? continuous data such as time or weight 3 of 21 what is the modal class? the class with the greatest frequency 4 of 21 can the median be found on a grouped frequency table? no it cannot 5 of 21 how do you estimate the mean of a frequency polygon? add the midpoints multiplied by the frequencies and dividing by the total frequency 6 of 21 how do you find the frequency density? frequency of the class interval / width of the class interval 7 of 21 what is the lower quartile? the value that splits the area in a ratio 1:3 8 of 21 what is the upper quartile? the value that splits the area in the ratio 3:1 9 of 21 what is the first stage of the data handling cycle? outlining the problem and planning - usually involves stating the hypothesis / problem 10 of 21 what is the second stage in the data handling cycle? stating how the data will be collected 11 of 21 what is the third stage in the data handling cycle? saying how the data will be processed and presented 12 of 21 what is the fourth stage in the data handling cycle? interpreting the results and making a conclusion 13 of 21 what is qualitative data? data such as the colour of cars 14 of 21 what is discrete quantative data numerical data that can only take certain values such as the number of the people on a bus 15 of 21 what is continuous data? numerical data that can take any value in the range of values such as the weight of apples 16 of 21 what is primary data? data that is collected using surveys or experiments 17 of 21 what is secondary data? data collected from existing lists or tables 18 of 21 what is a survey? an organised way of finding peoples opinions or testing a hypothesis 19 of 21 what do you use to collect vast amounts of data? questionaires 20 of 21 what is sampling? a method of finding imfomation using a small sample from a large population 21 of 21
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