Graphs
Mean, median, mode
Data types
Data questions
Challenge
100
What is the second-most popular app among teens?
Tiktok
100
Which measure of central tendency means 'the middle of the data'?
median
100
What is secondary data?
Data collected by someone else
100
What does a scatter plot with no correlation look like?
Data points spread out all over, not forming any sort of line.
100
On a scatter plot, is it better to have more or less data points. Explain your reasoning why.
It is better, because it allows you to more clearly see the correlation of the graph. With more data points, we can come to stronger conclusions.
200
What kind of graph should I use to show parts of a whole?
Circle graph/pie chart
200
What is the mode of this data?
23, 66, 90, 56, 22, 54, 23, 11, 90, 0
23 and 90
200
Describe the difference between qualitative and quantitative data
Quantitative - data that is a number (ex. height, weight)
Qualitative - data that is NOT a number (ex. favourite colour, sport)
200
What is a line of best fit on a scatter plot? Can you draw one on a graph that has no correlation?
A straight line that is drawn to hit as many data points as possible, showing the pattern of the data points on a scatter plot.
No you can't draw one on a graph that has no correlation.
200
Give an example of qualitative, two-variable data
Ex. Favourite colour and favourite number
300
What kind of graph requires two-variable data?
Scatter plot
300
Find the mean of this data:
14, 20, 1, 36, 74
29
300
Provide an example of discrete data
Ex. How many siblings you have
300
Describe the correlation of this scatter plot (strength, direction)
Strong positive correlation
300
What is simple random sampling?
Surveying a group that is completely random
400
What kind of graph is this?
Histogram
400
Calculate the range of this data with and without the outlier:
5, 9, 5, 3, 10, 18, 17, 86, 9
With outlier: 83
Without outlier: 15
400
Describe continuous data and provide an example.
Data that is measured, not counted. It can go into decimal places.
Ex. Temperature or Height
400
True or false:
Data with outliers will always cause the mean, median, and mode to change when we remove them.
False.
Ex. 1, 1, 2, 3, 4, 5, 6, 100
If we remove 100, the mode still is still 1.
400
How many variables is my data if I colour data on our class's heights, shoe size, and eye colour?
3 variables
500
What kind of graph shows change over time?
Line graph
500
Calculate the median of this data:
3, 4, 2, 10, 9, 8, 6, 8
The median is 7
500
Describe the difference between one and two variable data.
One variable data has only one category of data collected. Two variable data has two cateogories of data collected.
Ex. One variable = Hair colour
Two variable = Hair colour & Grade
500
Explain what a census is. Provide two examples of taking a census.
A census is a survey taken of an entire population.
Ex. Taking a survey of all citizens in Canada. Or taking a survey of all students at plymouth.
500
What are the measures of central tendency?
Mean, median, mode