Classifying Data
This type of data uses numbers, such as age, height or test scores.
What is numerical data?
Find the mode of: 4, 5, 5, 7, 8
What is 5?
In a dot plot, each dot usually represents _____.
What is one piece of data (or one response)?
In a stem-and-leaf plot, the number 47 would be written using stem ___ and leaf ___.
What are 4 and 7?
Evaluate: 3 × 4 + 2
What is 14?
Students were asked their favourite ice cream flavour. Is this categorical or numerical data?
What is categorical data?
Find the median of: 2, 3, 5, 7, 9
What is 5?
On a dot plot, which measure of centre is easiest to identify by finding the most common value?
What is the mode?
A stem-and-leaf plot must always contain one important feature that explains how to read the data.
What is a key?
Substitute x = 5 into: 2x + 3
What is 13?
A teacher records the number of siblings each student has. Is this discrete or continuous data?
What is discrete data?
Find the median of: 1, 3, 4, 5, 7, 9
What is 4.5?
A dot plot has most of its values clustered on the left and a tail stretching to the right. What shape is the distribution?
What is positively skewed?
Using the key 3 | 5 = 35, what number does 4 | 2 represent?
What is 42?
Solve: x + 8 = 15
What is 7?
A scientist measures the height of plants to the nearest millimetre. Is this discrete or continuous data?
What is continuous data?
Find the mean of: 4, 6, 8, 10
What is 7?
A dot plot has two clear peaks. What word describes this distribution?
What is bimodal?
A stem-and-leaf plot shows:
2 | 3 5 8
3 | 1 4 7
What is the median?
What is 29.5?
(Data: 23, 25, 28, 31, 34, 37)
Expand: 3(x + 4)
What is 3x + 12?
Classify this data set: "The time taken for students to complete a race."
What is continuous numerical data?
A data set is: 2, 3, 4, 5, 50
Which measure of centre best represents this data?
What is the median? (The mean is affected by the extreme value.)
A dot plot is strongly skewed because of several very large values. Which measure of centre is likely to be most useful?
What is the median?
A stem-and-leaf plot contains:
1 | 2 4 8
2 | 0 1 1 5
Find the range.
What is 13?
A rectangle has a length of x and a width of 4. Write an expression for its perimeter.
What is 2x + 8?
(Equivalent forms such as 2(x + 4) are acceptable.)