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Casio TEAMS Grant Algebra Lessons XXII

An experiment was performed which measured the number of hours a certain brand of battery allowed a toy rabbit to operate. Twenty-four randomly selected batteries of that particular brand were tested. Below are the number of hours each battery lasted.

Hours 34 37 29 31 32 33 31 29 28 35 36 30 36 30 29 34 22 33 35 32 30 32 34 28

Use the CASIO FX7400G to draw a boxplot for these data and give the five-number summary (Min, Q1, Median, Q3, Max) of the hours.

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 for our boxplot.

Press (V-Window)

Set up the viewing window as follows: 

     Xmin: 19.5    Ymin: - 2.3
     max : 39      max :   2.3
     scl :  2      scl :   1

Press

Press   (GRPH) 

Press (Green more key)

Press (Set)

Scroll down and set the parameters as follows:

StatGraph1 

G-Type:  Box    Press    if necessary.
  
XList :  List1  Press  if necessary.
  
Freq  :  1      Press  if necessary.

Press

Press (GRPH)

Press (GPH1)

The boxplot will appear on the calculator screen.

Press (Trace)

Use the right cursor arrow to move the "cross hairs" to get the five number summary.

The minimum value (Min) is 22. The first quartile value ( Q1 ) is 29.5. The median value (Med) is 32. The third quartile value ( Q3 ) is 34. The maximum value (Max) is 37.

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)