The mean
What is a mean ?
The average of some numbers.
What is the range of these numbers.
3, 4, 1, 7, 9, 7, 5, 6, 7, 4
8
What is a secondary source?
Data that has been collected/published by someone else before we use it.
Name 3 types of graphs
Examples: Column, bar, line, picture, graph, histogram, polygon, stem-and-leaf, dot plot, pie chart
What type of dogs do I have?
Dachshund / Sausage Dogs
How do you find the mean?
Adding all data values together and dividing them by the amount of values in the data set.
What is the mode of these numbers ?
2, 5, 4, 7, 9, 1, 3, 4, 2, 3, 6, 7, 3
=3
Find the mode, median, mean and range of these numbers.
14, 13,9,3,7,5,2,17,20
Range=18
Mean=10
Median= 9
Mode= none
30% people love chocolate ice cream, 38.5% people love vanilla and 18% people love strawberry and 13.5% love rocky road ice cream. What graph best displays this information?
Pie chart
What it the world's largest living animal?
The blue whale
What is the mean of these numbers ?
5, 10, 5, 4
6
What is the median of these numbers ?
7,6,8,5,9,2,4,1
=5,5
Which example of statistics could we use to set your final grade?
mean
How would you identify the mode on histogram?
Measure for the tallest column using the values on the vertical axis.
What is the hardest natural substance found on Earth?
Diamond
What is a census?
When an entire population is surveyed.
Findning the most common number is also called finding the
Mode
What do we use statistics for?
For analysis and better understanding data.
What is the difference between a histogram and a column graph?
A histogram has no gaps and represents continuous data
Which planet is 6th from the Sun?
Saturn
What is the mean of these numbers ?
7, 6, 9, 4, 6, 10, 11, 2, 3, 2, 6, 7, 3, 13, 1
6
Find the median range and mode of these numbers.
4,6,8,3,9,7,2,3,6,8,10,3
Median=6
Range=8
Mode=3
What is Categorical data?
Data that is NOT numerical data (Contains categories/words, colours, gender)
What is an outlier?
A value that is noticeable distinct from the main cluster (away from the cluster)
What do you call it when a caterpillar turns into a butterfly?
Metamorphosis