Term
| A sampling method is independent when |
|
Definition
| The individuals selected for one sample do not dictate which individuals are to be in a second sample |
|
|
Term
| A sampling method is dependent when |
|
Definition
| The individuals selected for one sample are used to determine the individuals in the second sample |
|
|
Term
|
Definition
|
|
Term
| 3 assumptions for testing hypotheses regarding the difference of two means using a matched-pairs design |
|
Definition
1. The sample is obtained using simple random sampling
2. The sample data are matched pairs
3. The differences are normally distributed with no outliers or the sample size n >= 30 |
|
|
Term
|
Definition
| The population mean difference of matched-pairs data |
|
|
Term
Two-tailed test, two dependent means
H0: mewd =
H1: mewd = |
|
Definition
H0: mewd = 0
H1: mewd not=to 0 |
|
|
Term
Left-tailed test, two dependent means
H0:
H1: |
|
Definition
|
|
Term
Right-tailed test, two dependent means
H0:
H1: |
|
Definition
|
|
Term
| Test statistic of two dependent means, t0 = |
|
Definition
dbar/(sd/n^0.5)
where dbar = the mean of differenced data
sd = standard deviation of differenced data |
|
|
Term
Two-tailed test, classical approach
If t0 > t(alpha/2), then |
|
Definition
|
|
Term
Left-tailed test, classical approach
If t0 < -talpha, then |
|
Definition
|
|
Term
Right-tailed test, classical approach
If t0 > talpha, then |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Minor departures from normality will not adversely affect the results of the test |
|
|
Term
| To determine outliers, we can use |
|
Definition
|
|
Term
| Confidence interval about a population mean = |
|
Definition
| Point estimate +/- margin of error |
|
|
Term
| Lower bound CI, matched-pairs data = |
|
Definition
| dbar - t(alpha/2) x sd/n^0.5 |
|
|
Term
| Upper bound CI, matched-pairs data = |
|
Definition
| dbar + t(alpha/2) x sd/n^0.5 |
|
|
