Year 9 Unit 3

What are averages used for in data analysis?

• To find the most extreme value

• To measure the central tendency or typical value of a set of data

• To calculate the total sum of a dataset

• To arrange data in order

What is a bar chart?

• A graph showing points connected by lines

• A graph using bars to show frequencies, which can be vertical or horizontal

• A circle divided into sectors

• A graph showing data over time

What does continuous data mean?

• Data that is counted and has a finite number of possible values

• Data with an infinite number of possible values, such as temperature or time

• Data that can be split into distinct categories

• Data measured at a specific point in time

What is correlation in data analysis?

• The total sum of data values

• The relationship between the data and the mean

• The strength of the relationship between two variables

• The frequency of each data point

What is discrete data?

• Data that can take on any value within a range

• Data that is measured continuously

• Data that is usually counted and has a finite number of possible values

• Data that changes over time

What is a histogram used for?

• To compare the distribution of continuous data

• To represent grouped data with segments along the x-axis proportional to class intervals

• To track changes in data over time

• To display categorical data in bars

What does a line graph display?

• The distribution of data in bars

• A series of data points connected by lines to show trends

• The relationship between two variables

• The most frequent data points

How is the mean calculated?

• By finding the middle value of a dataset

• By adding all the data together and dividing by the number of data points

• By selecting the most common data value

• By finding the difference between the highest and lowest values

What is the median of a set of data?

• The middle value when the data is arranged in numerical order

• The most commonly occurring value

• The average of the highest and lowest values

• The range of the dataset

What does the mode refer to in data analysis?

• The most commonly occurring value or class

• The middle value of the data

• The average of the dataset

• The difference between the largest and smallest values