Flashcards on Basic Data Processing and Presentation
Basic Data Processing and Presentation: A Student Guide
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Data Processing and Presentation
12 cards
Card 1
Question: What does 'processing your data' mean in the context of experiments?
Answer: Doing calculations with the raw data to make it more useful, then presenting results in charts or graphs to spot patterns.
Card 2
Question: Why are tables useful when organising data and what should you include when drawing one?
Answer: Tables are useful for organising data. When drawing one use a ruler and make sure each column has a heading, including units.
Card 3
Question: How do you calculate the mean of a set of repeated experimental measurements?
Answer: Add together all the data values and divide by the total number of values.
Card 4
Question: How do you calculate the range of a data set?
Answer: Find the largest number and subtract the smallest number from it.
Card 5
Question: Given repeats 28, 37 and 32 cm³, how is the mean and range calculated?
Answer: Mean = (28 + 37 + 32) ÷ 3 = 32 cm³. Range = 37 − 28 = 9 cm³.
Card 6
Question: How do you calculate the median of a data set?
Answer: Put all data in numerical order; the median is the middle value.
Card 7
Question: How do you identify the mode of a data set?
Answer: The mode is the number that appears most often in the data set.
Card 8
Question: For the data set 1, 2, 1, 1, 3, 4, 2 what are the median and mode?
Answer: Ordered: 1, 1, 1, 2, 2, 3, 4 so the median is 2 (middle value) and the mode is 1 (appears most often).
Card 9
Question: When should you use a bar chart to present data?
Answer: Use a bar chart when the independent variable is categoric (distinct categories) or discrete (countable chunks with no in-between values).
Card 10
Question: What types of independent variables are categoric examples of?
Answer: Examples include flower colour and blood group (distinct categories).