58

Using the TI-73: A Guide for Teachers

Probability

c.Starting from the first line in L1, enter the possible points as shown in the screen at the right. (You’ll get an error if L1 is still highlighted.) Press b after each list item.

d.Follow the same procedure to enter the class data into L2.

17.Now graph a histogram.

a.Access the STAT PLOTS menu.

-e (above the & key)

b.Make sure the other plots are off.

Qb

c.Select Plot 1.

-e b

d.With the cursor blinking on the word On, select it. b

e.Move to Type and select the histogram (second row, second from left Ò).

# " " " " " b

f.Move to Xlist. If L1 is not already set, set it to L1.

# - v b

g.Move to Freq. If L2 is not already set, set it to L2.

# - v Z

Your screen should look like the one at the right.

h.Set up the viewing window.

'

Enter the numbers as shown in the screen at the right. Use # to move down the fields.

Change Ymax to match your class data.

Set Ymin to -50so that both the values and the graph show during tracing.

➪ Note that @X is determined by the TI-73, depending on what is entered for Xmin and Xmax. Xscl represents the width of the bar on the histogram.

© 1998 TEXAS INSTRUMENTS INCORPORATED