Lessons / Activities : Lessons for Calculators : Casio TEAMS Grant Algebra Lessons

Lessons 27

A teacher uses a ten point grading scale to measure student performance. The following data were the final course averages for a class of 23 students:

56, 61, 79, 91, 91, 74, 70, 93, 55, 54, 93, 55, 65, 92, 64, 46, 97, 56, 79, 70, 60, 61, 68

Use the CASIO FX7400G to draw a histogram for these data.

Turn on the CASIO FX7400G.

Use your cursor arrows to highlight the STAT menu and press or just press when at the main menu screen.

Use your cursor arrows to move to the first cell in List1 and enter the data given above. After entering a value make sure to press to go down to the next cell.

Now we have to set the viewing window.

Press (V-Window)

Set up the viewing window as follows: 

     Xmin:  39    Ymin: - 4
     max : 117    max :  11
     scl :  10    scl :   1

Press

Press   (GRPH) 

Press (Green more key)

Press (Set)

Scroll down and set the parameters as follows:

StatGraph1

G-Type:  Hist   Press    if necessary.

XList :  List1  Press  if necessary.

Freq  :  1      Press  if necessary.

Press

Press (GRPH)

Press (GPH1)

Set the parameters as follows:

     Set Interval 
     Strt: 280 Press  if necessary
     ptch:  10 Press  if necessary

The histogram will appear on the calculator screen.

Press (Trace)

Use the right cursor arrow to move the "cross hairs" to get the frequencies in each category. The follow are visible:

x = 40  f=1
x = 50  f=5
x = 60  f=6
x = 70  f=5
x = 80  f=0
x = 90  f=6

What other statistics are available?

Press (Trace)

This will terminate the trace and return you to the calculator screen having the 1VAR submenu on it.

Press (1VAR)

Scroll down to see the following summary statistics that have been calculated on the data:

1-Variable

Press

Press

Turn off the CASIO FX7400G. Press (OFF)