Operation Manual

Chapter 17: Activities 306
4. Likewise, enter each man’s correct guesses in MLEFT (Men Left) and MRGHT (Men Right).
5. Press y ,. Select
1:Plot1. Turn on plot 1; define it as a modified box plot Õ that uses Xlist as
WLEFT. Move the cursor to the top line and select Plot2. Turn on plot 2; define it as a modified box
plot that uses Xlist as WRGHT. (See Chapter 12: Statistics for detailed information on using Stat
Plots.)
6. Press o. Turn off all functions.
7. Press p. Set Xscl=1 and Yscl=0. Press q 9 to select 9:ZoomStat. This adjusts the viewing
window and displays the box plots for the women’s results.
8. Press r.
Use | and ~ to examine
minX, Q1, Med, Q3, and maxX for each plot. Notice the outlier to the
women’s right-hand data. What is the median for the left hand? For the right hand? With which
hand were the women more accurate guessers, according to the box plots?
9. Examine the men’s results. Redefine plot 1 to use MLEFT, redefine plot 2 to use MRGHT. Press
r.
Press | and ~ to examine
minX, Q1, Med, Q3, and maxX for each plot. What difference do you
see between the plots?
10. Compare the left-hand results. Redefine plot 1 to use WLEFT, redefine plot 2 to use MLEFT, and
then press r to examine minX, Q1, Med, Q3, and maxX for each plot. Who were the better
left-hand guessers, men or women?
11. Compare the right-hand results. Define plot 1 to use WRGHT, define plot 2 to use MRGHT, and then
press r to examine
minX, Q1, Med, Q3, and maxX for each plot. Who were the better right-
hand guessers?
In the original experiment boys did not guess as well with right hands, while girls guessed equally
well with either hand. This is not what our box plots show for adults. Do you think that this is
because adults have learned to adapt or because our sample was not large enough?
Graphing Piecewise Functions
Problem
The fine for speeding on a road with a speed limit of 45 kilometers per hour (kph) is 50; plus 5 for each
kph from 46 to 55 kph; plus 10 for each kph from 56 to 65 kph; plus 20 for each kph from 66 kph and
above. Graph the piecewise function that describes the cost of the ticket.
Women’s left-hand data
Women’s right-hand data
Men’s left-hand data
Men’s right-hand data