Single-sample t test
For the single-sample t test, the confidence interval is centered around the:
Select one:
a. population mean.
b. standard error of the distribution of means.
c. mean of the sample.
d. difference between the sample and population means.
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If the standard deviation for a population, as estimated from a sample, is s = 5.6, then the standard error for a sample size of N = 16 is:
When conducting a paired-samples t test, we can assess the practical importance of our obtained results by calculating:
When conducting a paired-samples t test, we compare our sample mean difference to:
With very few degrees of freedom, the test statistic:
In a paired-samples t test, the null hypothesis posits that the mean of the comparison distribution is:
A researcher studies 45 volunteer citizens from a small community and asks them about the amount of caffeine (in milligrams) they ingest before and after lunch each day, a phenomenon that imagine we know is normally distributed.
Number of standard deviations a sample is from the population mean. Number of standard deviations an individual score is from the sample mean.
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