# 0.7 Notes for the ti-83, 83+, 84, 84+ calculators  (Page 2/3)

 Page 2 / 3

## To deselect equations:

1. Access the list of equations.

2. Select each equal sign (=).

3. Continue, until all equations are deselected.

## To clear equations:

1. Access the list of equations.

2. Use the arrow keys to navigate to the right of each equal sign (=) and clear them.

3. Repeat until all equations are deleted.

## To draw default histogram:

2. Select <9:ZoomStat> .

3. The histogram will show with a window automatically set.

## To draw custom histogram:

1. Access window mode to set the graph parameters.
• ${X}_{\mathrm{min}}=–2.5$
• ${X}_{\mathrm{max}}=3.5$
• ${X}_{scl}=1$ (width of bars)
• ${Y}_{\mathrm{min}}=0$
• ${Y}_{\mathrm{max}}=10$
• ${Y}_{scl}=1$ (spacing of tick marks on y -axis)
• ${X}_{res}=1$
2. Access graphing mode to see the histogram.

## To draw box plots:

1. Access graphing mode.
, [STAT PLOT]

2. Select <1:Plot 1> to access the first graph.

3. Use the arrows to select <ON> and turn on Plot 1.

4. Use the arrows to select the box plot picture and enable it.

5. Use the arrows to navigate to <Xlist> .
6. If "L1" is not selected, select it.
, [L1] ,

7. Use the arrows to navigate to <Freq> .
8. Indicate that the frequencies are in [L2] .
, [L2] ,

9. Go back to access other graphs.
, [STAT PLOT]

10. Be sure to deselect or clear all equations before graphing using the method mentioned above.
11. View the box plot.
, [STAT PLOT]

## Sample data

The following data is real. The percent of declared ethnic minority students at De Anza College for selected years from 1970–1995 was:

Year Student Ethnic Minority Percentage
1970 14.13
1973 12.27
1976 14.08
1979 18.16
1982 27.64
1983 28.72
1986 31.86
1989 33.14
1992 45.37
1995 53.1

## Note

The TI-83 has a built-in linear regression feature, which allows the data to be edited.The x -values will be in [L1] ; the y -values in [L2] .

## To enter data and do linear regression:

1. ON Turns calculator on.

2. Before accessing this program, be sure to turn off all plots.
• Access graphing mode.
, [STAT PLOT]

• Turn off all plots.
,

3. Round to three decimal places. To do so:
, [STAT PLOT]

• Navigate to <Float> and then to the right to <3> .

• All numbers will be rounded to three decimal places until changed.

4. Enter statistics mode and clear lists [L1] and [L2] , as describe previously.
,

5. Enter editing mode to insert values for x and y .
,

6. Enter each value. Press to continue.

## To display the correlation coefficient:

1. Access the catalog.
, [CATALOG]

2. Arrow down and select <DiagnosticOn>
... , ,

3. $r$ and $r^{2}$ will be displayed during regression calculations.
4. Access linear regression.

5. Select the form of y = a + bx .
,

The display will show:

## Linreg

• y = a + bx
• a = –3176.909
• b = 1.617
• r = 2 0.924
• r = 0.961

This means the Line of Best Fit (Least Squares Line) is:

• y = –3176.909 + 1.617 x
• Percent = –3176.909 + 1.617 (year #)
The correlation coefficient r = 0.961

## To see the scatter plot:

1. Access graphing mode.
, [STAT PLOT]

2. Select <1:plot 1> To access plotting - first graph.

3. Navigate and select <ON> to turn on Plot 1.
<ON>

4. Navigate to the first picture.
5. Select the scatter plot.

6. Navigate to <Xlist> .
7. If [L1] is not selected, press , [L1] to select it.
8. Confirm that the data values are in [L1] .
<ON>

9. Navigate to <Ylist> .
10. Select that the frequencies are in [L2] .
, [L2] ,

11. Go back to access other graphs.
, [STAT PLOT]

12. Use the arrows to turn off the remaining plots.
13. Access window mode to set the graph parameters.
• ${X}_{\mathrm{min}}=1970$
• ${X}_{\mathrm{max}}=2000$
• ${X}_{scl}=10$ (spacing of tick marks on x -axis)
• ${Y}_{\mathrm{min}}=-0.05$
• ${Y}_{\mathrm{max}}=60$
• ${Y}_{scl}=10$ (spacing of tick marks on y -axis)
• ${X}_{res}=1$
14. Be sure to deselect or clear all equations before graphing, using the instructions above.
15. Press the graph button to see the scatter plot.

IMAGESNEWSVIDEOS A Dictionary of Computing. measures of location Quantities that represent the average or typical value of a random variable (compare measures of variation). They are either properties of a probability distribution or computed statistics of a sample. Three important measures are the mean, median, and mode.
define the measures of location
IMAGESNEWSVIDEOS A Dictionary of Computing. measures of location Quantities that represent the average or typical value of a random variable (compare measures of variation). They are either properties of a probability distribution or computed statistics of a sample. Three important measures are th
Ahmed
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BITRUS
can man city win Liverpool ?
There are two coins on a table. When both are flipped, one coin land on heads eith probability 0.5 while the other lands on head with probability 0.6. A coin is randomly selected from the table and flipped. (a) what is probability it lands on heads? (b) given that it lands on tail, what is the Condi
0.5*0.5+0.5*0.6
Ravasz
It should be a Machine learning terms。
Mok
it is a term used in linear regression
Saurav
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Enhance
what is statistics
statistics is the collection and interpretation of data
Enhance
the science of summarization and description of numerical facts
Enhance
Is the estimation of probability
Zaini
mr. zaini..can u tell me more clearly how to calculated pair t test
Haai
do you have MG Akarwal Statistics' book Zaini?
Enhance
Haai how r u?
Enhance
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Miguel
can we discuss about pair test
Haai
what is outlier?
outlier is an observation point that is distant from other observations.
Gidigah
what is its effect on mode?
Usama
Outlier  have little effect on the mode of a given set of data.
Gidigah
How can you identify a possible outlier(s) in a data set.
Daniel
The best visualisation method to identify the outlier is box and wisker method or boxplot diagram. The points which are located outside the max edge of wisker(both side) are considered as outlier.
Akash
@Daniel Adunkwah - Usually you can identify an outlier visually. They lie outside the observed pattern of the other data points, thus they're called outliers.
Ron
what is completeness?
I am new to this. I am trying to learn.
Dom
I am also new Dom, welcome!
Nthabi
thanks
Dom
please my friend i want same general points about statistics. say same thing
alex
outliers do not have effect on mode
Meselu
also new
yousaf
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Gbenga
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alayo
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jainesh
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jainesh
hi
Kachalla
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Kachalla
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Bheka
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saliou
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Rohan
*male
Rohan
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Rohan
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Bheka
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Bheka
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Ambo
mean
Vanarith
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