Transcript Statistics and the Graphing Calculator

Statistics and the Graphing
Calculator
Essential Question: How do you find the mean,
median, mode and standard deviation of a set of data
using the graphing calculator?
Students will write a summary of the steps to use the
graphing calculator at the end of their notes.
Before you start working with any data set
• Give your list a name by scrolling to the box at
the top of the column and typing in a name.
– You probably want to keep this short because you
will have to type it multiple times.
• If your data set is not already entered, scroll
down to box 1 in that same column and start
entering data values.
– Press enter between data values.
To find the mean..
• Scroll into a blank box in the body of the data
table and type “=mean(name of your list)”
• Hit enter
To find the median..
• Scroll into a blank box in the body of the data
table and type “=median(name of your list)”
• Hit enter
To find the mode..
• Scroll up so that the entire column with your data is
highlighted
• Hit Menu
• Select Actions and then Sort
• Scroll through your data to see if you can find values
that repeat.
To find the standard deviation…
• Scroll into a blank box in the body of the data table and
hit the catalogue button.
• Scroll down and select “=stDevPop()”
• Type in the name of your list
• Hit enter
Example: Find the mean, median, mode, and standard deviation
of the data set “Weights of Pro Football Players”
225
230
235
238
232
227
244
222
250
226
242
253
251
225
229
247
239
223
233
222
243
237
230
240
255
230
245
240
235
252
245
231
235
234
248
242
238
240
240
240
235
244
247
250
236
246
243
255
241
245
To get the Mean, Median and Standard
Deviation all at once:
• Hit Menu
• Scroll to Statistics
• Select Stat Calculations
• Select One-Variable Statistics
• # of lists should be 1
• X1 list should be the name that you gave your
list
• Don’t change anything else.
• Hit ok.
• 𝑥 is the mean
• σx is the standard deviation
• MedianX is the median
Another Method…
• On a calculator page (there is one after each
spreadsheet) do the following:
• Hit menu
• Select Statistics
• Select List Math
• Select which calculation you would like to
have done.
• In the parenthesis type in the name of the list
Example: Find the mean, median, mode, and standard deviation
of the data set “Heights of Pro Basketball Players”
6.5
6.54
7
6.46
6
6.25
6.42
6.17
5.92
6.75
6.33
6.58
6.92
6.58
6.17
6.5
6
7
6.13
6.83
6.42
6.75
5.92
6.5
6
6.67
7
6.42
6.58
6.42
6.83
6.58
6
6.63
6.92
6.82
6.29
6.25
6.75
6.5
6.17
7
6.75
6.25
6.33
7
6.92
6.17
6.67
6.92
5.67
6.42
6.75
6.17
6.67
6.5
5.92
6.58
6.17
6.33
6.75
6.08
6.58
6.25
6.08