Data Handling

• What is the graphical representation of data that uses bars to compare different categories of data called?

  Bar graph
• How does a bar graph represent data?

  It uses vertical heights of bars to represent values of the dependent variable.
• What is a biased question?

  A question that may influence the respondent to answer untruthfully.
• What is a box-and-whisker plot used for?

  To show the distribution of data along a number line divided into quartiles.

  
• What characterizes a broken line graph?

  It has numbers that alternate going up and down without a consistent curve.
• What is categorical data?

  Data given in the form of words, names, or labels.
• What is a class interval?

  Data divided into a smaller number of categories.
• What is a compound bar graph?

  A graph that displays two or more sets of data showing a part/whole relationship.
• What is continuous data?

  Data given as numbers, including decimals and fractions.
• What is the definition of data?

  Information, observations, measurements, and facts collected for statistical investigation.
• What is a data collection sheet?

  A two-column table showing observations and their frequencies.
• What does data handling refer to?

  The process of collecting, organizing, summarizing, representing, and analyzing information.
• What is discrete data?

  Data that can have only certain values, usually whole numbers.
• What is a double bar graph?

  A multiple bar graph that compares two sets of data.
• What does frequency (f) represent?

  The number of times a data value is recorded.
• What is a frequency table?

  A table showing frequencies in an organized form.
• What does it mean to group data?

  To put data into classes, sort, arrange, or organize it.
• What is grouped data?

  Data given in the form of intervals.
• What is a histogram?

  A graph using adjacent bars to show frequencies of continuous numerical data.
• What is a horizontal bar graph?

  A bar graph using horizontal bars to compare or rank items.
• What is an impossible outcome?


  An outcome that has no chance of happening.
• What is an interview in data collection?

  A method of recording data by talking to someone face to face or over the telephone.
• What is the inter-quartile range?

  The difference between quartile 3 and quartile 1.
• What does it mean to investigate data?

  To examine, look into, or study the data.
• What is a line graph?

  A graph that uses line segments to connect data points and shows changes over time.
• What is the maximum value in a data set?

  The highest or biggest value in the data set.
• What is the mean?

  The average of the values in a data set.
• How is the mean calculated?

  By dividing the sum of all observed values by the number of observations.
• What is the median?

  The middle value in an ordered data set.
• How is the median calculated?

  By arranging data values in ascending order and finding the middle value.
• What is the mode?

  The value or values that appear most often in a data set.
• What does it mean if a data set is bimodal?

  It means two values occur most frequently.
• What is the range of data?

  The difference between the highest and lowest values in the data set.
• What does a small range indicate about data?

  It indicates that the data is clustered together.

  
• What does a large range indicate about data?

  It indicates that the data is more spread apart.
• What are the measures of central tendency?

  Mean, median, and mode.
• What are the measures of spread?

  Range and interquartile range.
• What is the interquartile range (IQR)?

  The difference between the upper quartile (Q3) and the lower quartile (Q1).
• What does a low IQR indicate?

  It indicates that the middle 50% of the data is close together.
• What does a high IQR indicate?

  It indicates that the middle 50% of the data is far apart.