Standard Deviation -5. Range- difference between highest & lowest value in a set of data Standard...
-
Upload
esmond-wilson -
Category
Documents
-
view
217 -
download
1
Transcript of Standard Deviation -5. Range- difference between highest & lowest value in a set of data Standard...
Standard Deviation-5
• Range- difference between highest & lowest value in a set of data
• Standard Deviation- a widely used measurement of variability or diversity in statistics
• Variation- a measure of change in data
DO NOT WRITE
• Standard Deviation
• Variance2 2
1
1( )
n
ii
x xn
2
1
1( )
n
ii
x xn
Graphing Calculator
• Enter lists of data just like central tendencies
• To calculate mean, variance, and standard deviation:
STAT->-CALC-1 VAR STATS-ENTER-2ND –STAT-NAMES 1-ENTER-ENTER
WHAT TO LOOK FOR
• Without clearing the calculator, enter the ENTIRE This will give you the variance.
#
tan
X ismean
x is s dard deviation
2( #)x
Find the mean, standard deviation, and variance.
• {5.6, 5.6, 5.7, 5.8, 5.8, 5.8, 5.9, 6.1}
• Range=• Mean( )=X
2( )
x
x
.5
5.7875
.1536025716
.02359375
Assignment