Mean ,Median, Mode
What is the definition of the term Mean
The average number in a set of data
Name the five number summary of a BOX PLOT
Min
Lower Quartile
Median
Upper Quartile
Max
This graph uses bars to compare groups such as favorite foods: pizza, tacos, burgers, and pasta. What type of graph is it?
Bar graph
What are the two types of data
Check your notebook
Categorical and numerical
Mr.a records number of minutes each student pratices at home 11,13,15,18,20,24 if he adds 45 to the set what will happen to the mean ?
Find the mean with 45 and without 45 (tell me the difference )
The Mean will increase
What is the mode of this set
15,18,18, 18, 19, 20 , 28, 29, 8, 8, 13, 8
Remember put numbers in order least to greatest
18, and 8
A box plot has a minimum of 10 and a maximum of 30. What is the range of the data?
20 because 30 − 10 = 20
This display uses dots above numbers to show how many times each number appears. What type of graph is it?
Dot plot
A survey asks students for their favorite color. Is the data categorical or numerical?
Categorical
What is the Interquartile Range of this data set
Min :9
Lower Quartile: 11
Median : 15
Upper quartile : 18
Max :20
7
find the median
15,18,18, 18, 19, 20 , 28, 8, 8, , 8
18
Look at this five-number summary: Minimum = 2, Q1 = 5, Q2 = 8, Q3 = 12, Maximum = 15. What is the median?
8
This display organizes data into a table and tells how many times each value or category occurs. What is it called?
Frequency table
A teacher records each student's height in inches. Is the data categorical or numerical?
Numerical
How many answers does a statistical question have?
More than 1
Find the Range
15,18,18, 18, 19, 20 , 28, 8, 8, , 8
12
What is the largest value on the box plot called
The Max
A teacher groups test scores into intervals: 50–59, 60–69, 70–79, 80–89, 90–100. Which graph should the teacher use to show these grouped numerical data?
Histogram
A basketball coach records the number of points each player scores: 8, 12, 5, 17, 10, 14. What type of data is this? Name one graph that could display it.
Numerical; a dot plot or histogram could display it.
How many answers Does a NON STATISTICAL QUESTION HAVE ?
1
What is the measure of center when you have NO outliers in your set
Mean
Median
Or Mode n
Mean
A box plot has Q1 = 12 and Q3 = 20. What is the interquartile range (IQR)?
8 because 20 − 12 = 8.
Jamal wants to display students’ favorite sports: football, basketball, soccer, and baseball. Should he use a bar graph or histogram? Explain why.
Bar graph, because favorite sport is categorical data.
A class collects this data: Dog, Cat, Dog, Fish, Cat, Dog. What type of data is this, and why?
Categorical, because the answers are names/groups rather than measurements.
What does the TERM MAD stand for ?
Mean Absolute Deviation