SITE-A teams: Lesson 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.

Ac_on.gif (1767 bytes)

Use your cursor arrows to highlight the STAT menu and press exe.gif (1747 bytes)

or just press 2.gif (1709 bytes) 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 exe.gif (1747 bytes) to go down to the next cell.

Now we have to set the viewing window.

Press shiftf3.gif (1888 bytes) (V-Window).

Set up the viewing window as follows:

Xmin:    39    Ymin:    - 4

max:    117    max:    11

s c l:      10    s c l:     1

Press quit.gif (1764 bytes)

Press f1.gif (1719 bytes) (GRPH)

Press flag.gif (1724 bytes) (Green more key)

Press f4.gif (1732 bytes) (SET )

Scroll down and set the parameters as follows:


G-Type:        Hist         Press flag.gif (1724 bytes)f1.gif (1719 bytes) if necessary.

XList:          List1         Press f1.gif (1719 bytes) if necessary.

Freq:              1           Press f1.gif (1719 bytes) if necessary.

Press quit.gif (1764 bytes)

Press f1.gif (1719 bytes) (GRPH)

Press f1.gif (1719 bytes) (GPH1)


Set the parameters as follows:

Set Interval

Strt:     40    Press exe.gif (1747 bytes) if necessary.

ptch:    10    Press exe.gif (1747 bytes) if necessary.

Press f4.gif (1732 bytes) (DRAW)

The histogram will appear on the calculator screen.

Press shiftf1.gif (1869 bytes) (Trace)

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

x = 40


x = 50


x = 60


x = 70


x = 80


x = 90


What other statistics are available?

Press shiftf1.gif (1869 bytes) (Trace)

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

Press f1.gif (1719 bytes) (1VAR)

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


lesson27.gif (3178 bytes)

Press quit.gif (1764 bytes)

Press menu.gif (1772 bytes)

Turn off the CASIO fx7400G. Press shiftac.gif (1924 bytes) (OFF)