today in algebra… warm up: stem-and-leaf plot, mean, median, mode and range review eoc practice...
TRANSCRIPT
TODAY IN ALGEBRA…
Warm up: Stem-and-Leaf plot, Mean, Median, Mode and Range
Review EOC Practice (from Friday)
Learning Target: 13.6 You will compare measures of central tendency and dispersion
AT – Test corrections
WARM UP: Make a stem-and-leaf plot of the data. Then find the mean, median, mode and range.
Stem
1
2
3
4
5
6
Leaves
4 6
2
0 5
1 8
2
Key:
5 8• MEAN:
• MEDIAN:
• MODE: none
• RANGE:
13.8 BOX-AND-WHISKER PLOTBOX-AND-WHISKER PLOTS: organizes data into four groups including the lower quartile and the upper quartile.EXAMPLE: Draw a box-and-whisker plot for the following data
STEP 1: Write values in increasing order.STEP 2: Find the median.STEP 3: Find the lower quartile and the upper quartile.
173 ,179 ,181 ,198 ,206 ,239 ,246 ,251 ,257 ,261 ,295
Lower half Upper half
𝟐𝟑𝟗 ,Median
𝟏𝟖𝟏 ,
Lower quartile
𝟐𝟓𝟕 ,
Upper quartile
13.8 BOX-AND-WHISKER PLOTEXAMPLE: Draw a box-and-whisker plot for the following data
STEP 4: Graph the value on a number line.
173 ,179 ,181 ,198 ,206 ,239 ,246 ,251 ,257 ,261 ,295
Lower half Upper half
𝟐𝟑𝟗 ,Median
𝟏𝟖𝟏 ,
Lower quartile
𝟐𝟓𝟕 ,
Upper quartile
173181 239 257 295
13.8 BOX-AND-WHISKER PLOTEXAMPLE : Draw a box-and-whisker plot for the following data
STEP 1: Write values in increasing order.STEP 2: Find the median.STEP 3: Find the lower quartile and the upper quartile.
15 ,20 , 25 ,30 , 40 , 60 ,70
Lower half Upper half
𝟑𝟓 .𝟓Median
𝟐𝟐 .𝟓 ,
Lower quartile
𝟓𝟕 .𝟓 ,
Upper quartile
Median:
55 ,
Average: Average:
13.8 BOX-AND-WHISKER PLOTEXAMPLE : Draw a box-and-whisker plot for the following data
STEP 1: Write values in increasing order.STEP 2: Find the median.STEP 3: Find the lower quartile and the upper quartile.
Median:
15 ,20 , 25 ,30 , 40 , 60 ,70
Lower half Upper half
𝟑𝟓 .𝟓Median
𝟐𝟐 .𝟓 ,
Lower quartile
𝟓𝟕 .𝟓 ,
Upper quartile
55 ,
Average: Average:
13.8 BOX-AND-WHISKER PLOTEXAMPLE: Draw a box-and-whisker plot for the following data
STEP 4: Graph the value on a number line.
15 181 35.5 57.5 70
15 ,20 , 25 ,30 , 40 , 60 ,70
Lower half Upper half
𝟑𝟓 .𝟓Median
𝟐𝟐 .𝟓 ,
Lower quartile
𝟓𝟕 .𝟓 ,
Upper quartile
55 ,
20253035404550556065
13.8 BOX-AND-WHISKER PLOTCHECKPOINT: Complete problems Pg.889: 3-6
Make a box-and-whisker plot of the data.
13.8 BOX-AND-WHISKER PLOTCHECKPOINT: Complete problems Pg.889: 3-6Make a box-and-whisker plot of the data.
13.8 BOX-AND-WHISKER PLOTCHECKPOINT: Complete problems Pg.889: 3-6Make a box-and-whisker plot of the data.
13.8 BOX-AND-WHISKER PLOT
INTERPRETING BOX-AND-WHISKER PLOTS
173181 239 257 295
Each whisker represents of the data.
Each side of the median in the box represents of the data.
Example: of the data collected is between
13.8 BOX-AND-WHISKER PLOTEXAMPLE: The box-and-whisker plots below show the normal precipitation(in inches) each month in Dallas and Houston, TX
1. For how many months is Houston’s precipitation less than 3.5 inches? of the total months
¿𝟑%
13.8 BOX-AND-WHISKER PLOTEXAMPLE: The box-and-whisker plots below show the normal precipitation(in inches) each month in Dallas and Houston, TX
1. Compare the precipitation in Dallas and in Houston. Which city typically has the most rain?
Houston typically has more rain since most of the data lies further to the right.
13.8 BOX-AND-WHISKER PLOTCHECKPOINT: Complete problems Pg.890: 8-10
In Exercises 8-10 use the box-and-whisker plot.
Should be of data values that lie between 11 and 20