8.3.3 - Minitab Express: Paired Means Test
The steps for constructing a confidence interval or conducting a paired means \(t\) in Minitab Express are identical. The output that procedure provides includes both the confidence interval and the \(p\)-value for determining statistical significance.
MinitabExpress – Conducting a Paired Means Test
Let's compare students' SAT-Math scores to their SAT-Verbal scores.
- Open the Minitab Express file:
- On a PC: In the menu bar select STATISTICS > Two Samples > Paired t
- On a Mac: In the menu bar select Statistics > 2-Sample Inference > Paired t
- Double click the variable SATM in the box on the left to insert the variable into the Sample 1 box
- Double click the variable SATV in the box on the left to insert the variable into the Sample 2 box
- Click OK
This should result in the following output:
Paired t: SATM, SATV
Sample | N | Mean | StDev | SE Mean |
---|---|---|---|---|
SATM | 215 | 599.814 | 84.700 | 5.776 |
SATV | 215 | 580.326 | 82.436 | 5.622 |
Mean | StDev | SE Mean | 95% CI for \(\mu_d\) |
---|---|---|---|
19.488 | 89.808 | 6.125 | (7.416, 31.561) |
\(\mu_d\) : mean of (SATM - SATV)
Null hypothesis | H0: \(\mu_d\) = 0 |
---|---|
Alternative hypothesis | H1: \(\mu_d\) ≠ 0 |
T-Value | P-Value |
---|---|
3.18 | 0.0017 |
Video Walkthrough
Select your operating system below to see a step-by-step guide for this example.
On the next page, the five-step hypothesis testing procedure is used to interpret this output.