Scientific Calculator and Standard Deviation
To find the Standard Deviation on the TI-30XIIS
1. Press 2nd Data (Stat) and Select 1-Var by moving your cursor right or left. Note: You may
not need to move your cursor at all.
2. Press Data and Enter your values in X1, X2, … (move cursor up and down to put in data). Press
Enter when finished. Note: The Frequency usually equals 1
3. Press StatVar
N = # of terms
x
= Mean
Sx = Sample Standard Deviation
x
= Population Standard Deviation
To find the Standard Deviation on the TI-30XS
1. Press the Data button
2. Put your data in List 1 (L1)
3. Press 2nd Data and press 1-Var Stats (#1)
4. Move the Cursor down to CALC (Calculate) and Press Enter
N = # of terms
x
= Mean
Sx = Sample Standard Deviation
x
= Population Standard Deviation
To find the Standard Deviation on the CASIO fx-300MS
1. Press the MODE button, select #2: SD
2. Enter first data value. Press DT, which is the “M+” button.
3. Continue entering data, pressing DT after each entry.
4. Press the AC button to clear.
5. Press SHIFT 2 to get the S-VAR menu.
6. Choose #5: VAR
7. Select from
#1:
x
= Mean
#2: X n = Population Standard Deviation
#3: X  n 1 = Sample Standard Deviation
To find the Standard Deviation on the CASIO fx-300ES
1. Press the MODE button, select #2: Stat
2. Choose #1: 1-VAR
3. Enter data into column X, pressing “=” after each entry.
4. Press the AC button to clear.
5. Press SHIFT 1 to get the STAT menu.
6. Choose #5: VAR
7. Select from
#1: N = # of terms
#2:
x
= Mean
#3: X  n = Population Standard Deviation
#4: X  n 1 = Sample Standard Deviation
EXAMPLES
1.
This table shows the scores of the first six games played in a professional basketball
league.
Winning Score
110 98
91
108 109 116
Losing Score
101 88
84
96
77
114
The winning margin for each game is the difference between the winning score and the
losing score. What is the standard deviation of the winning margins for these data?
A. 3.8 points
B. 8.3 points
C. 9.5 points
D. 12.0 points
2.
This frequency table shows the heights for Mrs. Quinn’s students.
Height
(in inches)
42
43
44
45
46
47
48
Frequency
1
2
4
5
4
2
1
What is the approximate standard deviation of these data?
A. 1.0 inches
B. 1.5 inches
C. 2.5 inches
D. 3.5 inches