I know that you must enter the data using the sigma + key. I also what the buttons for the mean and standards deviation are, but when i try to use them i get the wrong answer.
I would like to know the whole process from start to finish to see if i am missing anything.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
This will show you how to do statistics (calculate average, standard deviation, regressions etc.) as to the mode and median refer to the definitions.
TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.
I assume
you
know the theory. I will show you the key strokes
For
1-Var statistics Press [MODE][3:STAT] [1:1-VAR].
You are ready to
enter values in the X column. Enter a number and press [=]. Cursor
jumps to second number to enter. Keep entering numbers and pressing
[=] till all numbers are in. Press the [=] key after the
last one. Press
[AC] key to clear the screen. Press
[SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the
statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1. Press
the
number corresponding to the statistical value you want, ex 1:n . The
variable appears on screen. Press [=] and it will be displayed. To
display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .
To access the sum of squares sigma x^2 and the sum of data sigma x
press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x].
Press [SHIFT][STAT][6:MinMax] to access minX and maxX.
For 2-var statistics To
perform
2 variable statistics you press [MODE][3:STAT] and any of the
other regression options (except 1:1-Var). A two column template opens
where you enter the X and Y values. When finished entering data, press
[SHIFT][STAT][5:Var]. to access the different statistics. As I assumed
above, you should be able to
recognize what each variable means.
The variance is the square of the standard variation
TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.
I assume
you
know the theory. I will show you the key strokes
for
1-Var statistics Press [MODE][3:STAT] [1:1-VAR].
You are ready to
enter values in the X column. Enter a number and press [=]. Cursor
jumps to second number to enter. Keep entering numbers and pressing
[=] till all numbers are in. Press the [=] key after the
last one. Press
[AC] key to clear the screen. Press
[SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the
statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1. Press
the
number corresponding to the statistical value you want, ex 1:n . The
variable appears on screen. Press [=] and it will be displayed. To
display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .
To access the sum of squares sigma x^2 and the sum of data sigma x
press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x].
Press [SHIFT][STAT][6:MinMax] to access minX and maxX.
For 2-var statistics To
perform
2 variable statistics you press [MODE][3:STAT] and any of the
other regression options (except 1:1-Var). A two column template opens
where you enter the X and Y values. When finished entering data, press
[SHIFT][STAT][5:Var]. to access the different statistics. As I assumed
above, you should be able to
recognize what each variable means.
Press 2nd [CSR] (shift-7) to clear the statistical registers. Use the Sigma+ key (just above STO) to enter data points. Use 2nd [Sigma-] to remove erroneous data points. Use 2nd [sigma x n] (shift-divide) to compute the population standard deviation, or 2nd [sigma x n-1] (just to the left of the previous key) to compute the sample standard deviation.
Calculator must be in SD mode (standard deviation mode) :Press [MODE] [.]
However, if [FIX] or [SCI] appears on display you must press [MODE][9] first.
Data input always starts with [SHIFT][SAC], to clear the registers of old data.
Type a number and press the [DATA] key, it is the [M+] key at the bottom right of keypad.
After you finish entering the data
Press [SHIFT] [9] (sigma n-1) to get sample standard deviation Press [SHIFT][8] (sigma n] for the population standard deviation Press [SHIFT] [7] (xbar) for the mean Press [SHIFT] [6] (n) for the number of data entries Press [SHIFT] [5] (capital sigma x) for the sum of values Press [SHIFT] [4] (capital sigma x to y) for the sum of squares of the values
Calculator must be in SD mode (standard deviation mode)
:Press [MODE] [.]
However, if [FIX] or [SCI] appears on display you must
press [MODE][9] first.
Data input always starts with
[SHIFT][SAC], to clear the registers of old data.
Type a number and press the [DATA] key, it is the [M+]
key at the bottom right of keypad.
After you finish entering
the data
Press [SHIFT] [9] (sigma n-1) to get sample standard
deviation Press [SHIFT][8] (sigma n] for the population standard
deviation Press [SHIFT] [7] (xbar) for the mean Press [SHIFT] [6]
(n) for the number of data entries Press [SHIFT] [5] (capital sigma
x) for the sum of values Press [SHIFT] [4] (capital sigma x to y) for
the sum of squares of the values
For additional information
you might consider taking a look at the calculator manual
Calculator must be in SD mode (standard deviation mode) :Press [MODE] [.]
However, if [FIX] or [SCI] appears on display you must press [MODE][9] first.
Data input always starts with [SHIFT][SAC], to clear the registers of old data.
Type a number and press the [DATA] key, it is the [M+] key at the bottom right of keypad.
After you finish entering the data
Press [SHIFT] [9] (sigma n-1) to get sample standard deviation Press [SHIFT][8] (sigma n] for the population standard deviation Press [SHIFT] [7] (xbar) for the mean Press [SHIFT] [6] (n) for the number of data entries Press [SHIFT] [5] (capital sigma x) for the sum of values Press [SHIFT] [4] (capital sigma x to y) for the sum of squares of the values
Calculator must be in SD mode (standard deviation mode)
:Press [MODE] [.]
However, if [FIX] or [SCI] appears on display you must
press [MODE][9] first.
Data input always
starts with [SHIFT][SAC], to clear the registers of old data.
Type a number and press the [DATA] key, it is the [M+]
key at the bottom right of keypad.
After you finish entering
the data
Press [SHIFT] [9] (sigma n-1) to get sample standard
deviation Press [SHIFT][8] (sigma n] for the population standard
deviation Press [SHIFT] [7] (xbar) for the mean Press [SHIFT] [6]
(n) for the number of data entries Press [SHIFT] [5] (capital sigma
x) for the sum of values Press [SHIFT] [4] (capital sigma x to y) for
the sum of squares of the values
Calculator must be in SD mode (standard deviation mode)
:Press [MODE] [.]
However, if [FIX] or [SCI] appears on display you must
press [MODE][9] first.
Data input always starts with
[SHIFT][SAC], to clear the registers of old data.
Type a number and press the [DATA] key, it is the [M+]
key at the bottom right of keypad.
After you finish entering
the data
Press [SHIFT] [9] (sigma n-1) to get sample standard
deviation Press [SHIFT][8] (sigma n] for the population standard
deviation Press [SHIFT] [7] (xbar) for the mean Press [SHIFT] [6]
(n) for the number of data entries Press [SHIFT] [5] (capital sigma
x) for the sum of values Press [SHIFT] [4] (capital sigma x to y) for
the sum of squares of the values
For additional information
you might consider taking a look at the calculator manual
Texas Instruments TI-86 Statistics How-To Information
The following instructions should allow you to calculate the mean and standard deviation using a TI-86 calculator.
Press STAT
Select EDIT
Enter data into a list: [2.32 ENTER 2.43 ENTER 2.39 ENTER, etc.] Continue until all data have been entered. (use arrows keys to go to the y value, if any)
EXIT
until you reach the main ("blank") screen. (If you try to calculate
while you're in the data menu, it thinks you're still trying to enter
data!)
Press STAT
Select CALC
Select OneVa
Select LIST, NAMES, xStat(F2), Press ENTER
The
calculator provides Max, Min, Mean, Standard Deviation, Sum, Sigma,
etc. You will be primarily interested in the Mean and Standard
Deviation (sx).
×