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Test Review – Chapters 1, 2, 3
Chapter 1 – Definitions
Statistic vs Parameter
Qualitative vs Quantitative
Nominal
/
Ordinal
Discrete vs Continuous
/
Interval
/
Ratio
Types of Sampling Methods
(Random, Simple Random, Systematic, Convenience, Cluster, Stratified)
Chapter 2 – Descriptive Statistics
Construct a frequency distribution and/or a relative frequency distribution
Frequency
Relative Frequency
Class A
Class B
Class C
Read and interpret graphs of data (pie chart, bar graph, histogram, etc.)
Determine the class width for a frequency distribution (continuous data)
Class Width =
(highest data point - lowest data point)
number of classes
(Round up)
Chapter 3 – Statistics
Most statistics: “STAT” “CALC” “1-VarStats”
x  
z-score =

IQR = Q3 – Q1
Lower Fence = Q1 – (1.5×IQR)
Upper Fence = Q3 + (1.5×IQR)
Memorize the percents for the Empirical Rule and know how to apply them
Calculate the mean and median of a data set
Calculate the standard deviation and range of a data set
Determine whether a data set is symmetric or skewed
Mean = Median
Mean < Median
Mean > Median
Determine which measure of center and which measure of variation is best for a data
set
Center
Variation
Skewed Data:
Symmetric Data:
Calculate and interpret a z-score z-score =
x  

Find the 5-number summary of a data set (min/max/Q1/Q2/Q3)
Calculate the IQR and upper/lower fences and determine if a data set has outliers
IQR = Q3 – Q1
Lower Fence = Q1 – (1.5×IQR)
Upper Fence = Q3 + (1.5×IQR)
Compare box plots (variation) and determine the shape