HP 41C and HP 42S: Paired T Statistic
Introduction
The program PAIRT compares two means of two populations. With this statistic, the paired t statistic test the null hypothesis:
μ_1 = μ_2, with degrees of freedom n - 1.
Formulas used:
D = 1/n * Σ(x_i - y_i)
S = √(( n * Σ(D^2) - (ΣD)^2) / (n * (n - 1))) / √n
t = D / S
Note: The default statistics registers are R11 - R16.
HP 41C/DM 41 Program: PAIRT
01 LBL T^PAIRT
02 T^PAIRED T
03 AVIEW
04 PSE
05 CLΣ
06 LBL 00
07 T^ENTRY Y/X:
08 PROMPT
09 X<>Y
10 -
11 Σ+
12 T^MORE? N=0
13 PROMPT
14 X≠0?
15 GTO 00
16 SDEV
17 RCL 16
18 SQRT
19 /
20 STO 00
21 MEAN
22 RCL 00
23 /
24 ^T=
25 AVIEW
26 PSE
27 END
HP 42S/DM 42 Program: PAIRT
00 {67-Byte Prgm}
01 LBL "PAIRT"
02 "PAIRED T"
03 AVIEW
04 PSE
05 CLΣ
06 LBL 00
07 "ENTRY Y/X:"
08 PROMPT
09 X<>Y
10 -
11 Σ+
12 "MORE N=0?"
13 PROMPT
14 X≠0
15 GTO 00
16 SDEV
17 RCL 16
18 SQRT
19 ÷
20 STO 00
21 MEAN
22 RCL÷ 00
23 "T="
24 AVIEW
25 PSE
26 RTN
27 END
Instructions
1. Run PAIRT, by XEQ PAIRT
2. For each data point, enter y, press ENTER, then x, then press R/S. If you have more data points to enter, enter a nonzero value (any nonzero value) at the "MORE? NO=0" prompt. When you are done, enter 0 at the "MORE? NO=0" prompt.
3. At the "T=" prompt, press R/S to see the t statistic.
Example
Data: (x,y)
(4.3, 8.1)
(4.2, 8.6)
(4.5, 9.6)
(13.0, 10.4)
Result: T = -1.5043
Source:
HP-33E Statistics Applications Hewlett Packard Company: Corvallis, OR. February 1978
Eddie
All original content copyright, © 2011-2019. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.
Introduction
The program PAIRT compares two means of two populations. With this statistic, the paired t statistic test the null hypothesis:
μ_1 = μ_2, with degrees of freedom n - 1.
Formulas used:
D = 1/n * Σ(x_i - y_i)
S = √(( n * Σ(D^2) - (ΣD)^2) / (n * (n - 1))) / √n
t = D / S
Note: The default statistics registers are R11 - R16.
HP 41C/DM 41 Program: PAIRT
01 LBL T^PAIRT
02 T^PAIRED T
03 AVIEW
04 PSE
05 CLΣ
06 LBL 00
07 T^ENTRY Y/X:
08 PROMPT
09 X<>Y
10 -
11 Σ+
12 T^MORE? N=0
13 PROMPT
14 X≠0?
15 GTO 00
16 SDEV
17 RCL 16
18 SQRT
19 /
20 STO 00
21 MEAN
22 RCL 00
23 /
24 ^T=
25 AVIEW
26 PSE
27 END
HP 42S/DM 42 Program: PAIRT
01 LBL "PAIRT"
02 "PAIRED T"
03 AVIEW
04 PSE
05 CLΣ
06 LBL 00
07 "ENTRY Y/X:"
08 PROMPT
09 X<>Y
10 -
11 Σ+
12 "MORE N=0?"
13 PROMPT
14 X≠0
15 GTO 00
16 SDEV
17 RCL 16
18 SQRT
19 ÷
20 STO 00
21 MEAN
22 RCL÷ 00
23 "T="
24 AVIEW
25 PSE
26 RTN
27 END
Instructions
1. Run PAIRT, by XEQ PAIRT
2. For each data point, enter y, press ENTER, then x, then press R/S. If you have more data points to enter, enter a nonzero value (any nonzero value) at the "MORE? NO=0" prompt. When you are done, enter 0 at the "MORE? NO=0" prompt.
3. At the "T=" prompt, press R/S to see the t statistic.
Example
Data: (x,y)
(4.3, 8.1)
(4.2, 8.6)
(4.5, 9.6)
(13.0, 10.4)
Result: T = -1.5043
Source:
HP-33E Statistics Applications Hewlett Packard Company: Corvallis, OR. February 1978
Eddie
All original content copyright, © 2011-2019. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.
