Population mean for a dependent means t test

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a. What will always be the population mean for a dependent means t test?

b. Assuming that the difference between two independent sample means is 12, and S2difference = 36, the calculated t score should be __________.

c. If a psychologist interested in the effects of smell on concentration has 20 participants perform a standard task while exposed to an unpleasant smell and another 20 participants perform the same task without being exposed to the unpleasant smell, the appropriate test to analyze the data is a t test for __________. 

d. If 15 participants take a creativity test twice, once in a normal mental state and once under the influence of an experimental drug, the appropriate test to analyze the data is a t test for __________. 

e. The shape of the distribution of differences between means will be approximately  __________.

Reference no: EM132399757

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