Comparing data sets (Edexcel GCSE Statistics): Flashcards
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10 cards from this deck
What is the key statistical measure of central tendency?
What is the key statistical measure of central tendency?
Mean, median, and mode are central tendency measures.
How do you find the median in an ordered data set?
How do you find the median in an ordered data set?
Median is the middle value; if even, average the two middle.
What is the formula for the interquartile range (IQR)?
What is the formula for the interquartile range (IQR)?
IQR = Upper quartile - Lower quartile.
Which measure shows the spread of data around the mean?
Which measure shows the spread of data around the mean?
Standard deviation measures spread around the mean.
How do you compare two data sets using the range?
How do you compare two data sets using the range?
Calculate the range for each; larger range indicates more spread.
What statistic is used to identify the most frequent value?
What statistic is used to identify the most frequent value?
Mode is the most frequently occurring value.
How does a box plot visually compare data sets?
How does a box plot visually compare data sets?
Shows median, quartiles, range, and outliers for comparison.
Why compare measures of spread and central tendency?
Why compare measures of spread and central tendency?
To understand both the average and variability of data.
What is the importance of order in finding the median?
What is the importance of order in finding the median?
Order data to correctly locate the middle value or average.
How do you determine the median position for an odd data set?
How do you determine the median position for an odd data set?
Median at position (n+1)/2, where n is total data points.