To open a group of lists with the samples for the student survey data loaded, right-click here and choose "Save Target As" to download the file to your computer. Then find the downloaded file and send it to your calculator. For instructions on how to connect your calculator to your computer and transfer a file, click here.
NOTE: This data set is fairly small (8 values for each school). It may be just as fast to enter the data yourself directly in L1-L6.
On the TI calculator, the dataset is displayed in lists L1-L6:
Now use the TI calculator to calculate the numerical measures of a distribution:
Descriptive Statistics including five-number summary
STAT/CALC/1:1-Var Stats
. Specify which list the data is in: 2ND
and then the number of the list. For example, to access L1, you would press 2ND/1
.LIST
menu (2ND/STAT
). Press LIST/NAMES
to choose the appropriate list.FreqList
blank.Calculate
and Press ENTER
.x-bar | sample mean. This value is also the population mean if the data in the list are population data. |
Σx | sum of the x-values |
Σx2 | sum of the squared x-values |
Sx | sample standard deviation |
σx | population standard deviation |
↓n | sample size. The down arrow indicates that you can use the down arrow to view remaining statistics |
minX | minimum data value |
Q1 | first quartile |
Med | median |
Q3 | third quartile |
maxX | maximum data value |
Boxplot
Y=/CLEAR
, or else toggle them off by choosing Y=
and then pressing the left arrow until =
is selected and pressing ENTER
.STAT PLOT (2ND/Y=)
. 4:PlotsOff
. Hit ENTER
. STAT PLOT (2ND/Y=)
. 1:Plot1...Off
ON
by using arrows to highlight the word ON
, then press ENTER
. Type
: the fourth graph is a modified boxplot.Xlist
: 2ND
and then the number of the list. For example, to access L1, you would press 2ND/1
.LIST
menu (2ND/STAT
). Press LIST/NAMES
to choose the appropriate list.Freq: 1
(the number one) Mark
you prefer. ZOOM/9: ZoomStat
. WINDOW
, and set the following values: TRACE
and then use the left and right arrows to move the cursor around the boxplot to see the values for min
, Q1
, Med
, Q3
, andmax
.Side-by-side Boxplots
ZOOM/9:ZoomStat
to see all boxplots on the same screen. TRACE
, then use the up/down arrows to choose one of the boxplots and the left/right arrows to display min
, Q1
, Med
, Q3
, andmax
.