The cards Question What does a statistical summary do? Tap to flip Answer It sums up the features of a data set. Question Which three averages are measures of central tendency? Tap to flip Answer The mean, the median and the mode. Question What does the range of a data set measure? Tap to flip Answer The spread of the data. Question How is the (arithmetic) mean of a set of numerical data found? Tap to flip Answer Divide the sum of the values by the number of values. Question What is the median of a data set? Tap to flip Answer The central (middle) piece of data when the data are in numerical order. Question What is the mode of a data set? Tap to flip Answer The most frequent value. Question How is the range of a data set found? Tap to flip Answer Find the difference between the two extreme points: the lowest and highest values. Question What is frequency? Tap to flip Answer The number of times an event occurs, or the number of individuals with some specific property. Question In a grouped frequency table, what is an interval? Tap to flip Answer All the values between two points. Question What is the modal class? Tap to flip Answer The interval (group of values) with the highest frequency in a data set. Question What is the median class? Tap to flip Answer The class that contains the middle datum when the data are in numerical order. Question Can the mean be found exactly from a grouped frequency table? Tap to flip Answer No. It can only be estimated. Question Why must the mean from a grouped frequency table be estimated? Tap to flip Answer Because some of the detail of the data is lost when it is grouped. Question Is estimating the same as guessing? Tap to flip Answer No. Estimation is a process in which each step is logical. Question What is a stem and leaf diagram? Tap to flip Answer A systematic way to organise and represent numerical data by splitting each value into a stem and a leaf. Question In a stem and leaf diagram, what is the stem made of? Tap to flip Answer All but the last digit of each value. Question In a stem and leaf diagram, what is the leaf made of? Tap to flip Answer The last digit of each value. Question Why does a stem and leaf diagram need a key? Tap to flip Answer To preserve place value. Question Can the exact median (not just a median class) be found from a stem and leaf diagram? Tap to flip Answer Yes. The full data is still shown, in order, so the middle value(s) can be found. Question Which average is possible but very time consuming to calculate from a stem and leaf diagram? Tap to flip Answer The mean. Question What does a mean much higher or lower than the other averages suggest? Tap to flip Answer That there is an extreme value in the data set. Question Is one statistical summary always enough to compare two data sets? Tap to flip Answer No. The more you know about the data sets, the more complete the comparison. Question Does being easy to calculate make the mode the most useful average? Tap to flip Answer No. Being the easiest average to find does not make it the most useful. Question What is a bar chart? Tap to flip Answer A graph of bars that visually represent the frequency of objects or groups. Question What is a pictogram? Tap to flip Answer A graph that uses pictures to visually represent the frequency of objects or groups. Question What is another name for a composite bar chart? Tap to flip Answer A stacked bar chart. Question On a composite bar chart, can each group's frequency be read straight off the y-axis? Tap to flip Answer No. The groups are stacked, so each group's frequency needs to be calculated. Question What is a pie chart? Tap to flip Answer A circular graph in which sectors represent different groups proportionally. Question What is a sector? Tap to flip Answer The region formed between two radii and their connecting arc. Question Does a bigger sector on one pie chart than on another mean a larger frequency? Tap to flip Answer No. Pie charts show proportion, not frequency; the two charts' total frequencies may differ. Question What kind of data does a scatter graph represent? Tap to flip Answer Bivariate data. Question A claim made from data shown in a chart is valid only for what? Tap to flip Answer The particular selection of data shown. Question Why should care be taken when using spreadsheets to analyse data? Tap to flip Answer Human error can lead to incorrect results. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Maths Unit Comparisons of numerical summaries of data Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
Sources Total: 13 · primary: 13 · second publisher: 0
Show the other sources (11) Primary source Checking understanding of pie charts (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Comparing various representations of data sets (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Problem solving with comparisons of numerical data (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Calculating summary statistics from a grouped frequency table (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Calculating the mean from a grouped frequency table (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Constructing stem and leaf diagrams (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Calculating summary statistics from stem and leaf diagrams (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Checking understanding of measures of central tendency (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Comparing data sets in context (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Checking understanding of bar charts and pictograms (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Checking understanding composite and bar-line charts (opens in a new tab) (Oak National Academy, thenational.academy) Found a mistake? Write to support@flashfeed.app .
A Maths lesson by Oak National Academy licensed under Open Government Licence (OGL)
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