True or False
1) If the obtained sample data are in the critical region, thenwe could conclude that the data provide support for the nullhypothesis.
2) If a researcher is predicting that a treatment will increasescores, then the critical region for a directional test will be inthe right-hand tail
3) Whenever the statistical decision is to reject the nullhypothesis, there is risk of a type I error
4)In a type II error, the experimenter concludes there isevidence for an effect when in fact an effect does not exist
5) All other things being equal (Mean, Standard Deviation, M anda), You are more likely to make a Type I error with a sample of n=4than with a sample of n=11
6) If the null-hypothesis is rejected using a one-tailed test,then it certainly would be rejected if the researcher used atwo-tailed test.
7) Increasing the alpha level (for example from .01 to .05) willdecrease the size of the critical region.
8) The t-distribution is symmetrical and has a mean of 0
9) The t statistic is used for hypothesis tests in situationswhere the population standard deviation (or variance) isunknown.
