Null hypothesis posits
In a paired-samples t test, the null hypothesis posits that the mean of the comparison distribution is:
Select one:
a. -1.
b. 1.
c. 0.
d. the same as the mean of the population.
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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:
For the single-sample t test, the confidence interval is centered around the:
With very few degrees of freedom, the test statistic:
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.
A paired-samples test is reported as t(18) = 1.73. Make a decision about this test, assuming a two-tailed hypothesis test with a p level of 0.05.
A golf course architect has five linden trees, three white birch trees, and three bald cypress trees to plant in a row along a fairway. In how many ways can the landscape plant the trees in a row, assuming that the trees are evenly spaced?
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