# Samples t test has three assumptions including all

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samples t test has three assumptions, including all but:There are fewer than 30 sample data.9. We have learned three t tests, including all of the following exceptExperimental10. The single-sample t test compares a sample mean to a population mean when:The population standard deviation is unknown12. According to the null hypothesis, the mean difference for the comparison distribution in apaired-samples t test is:Always 0 14. A researcher conducts a single-sample t test and finds statistical significance at the 0.01 level.The effect size is then calculated and found to be 0.04. What might you conclude about thefindings?While the results of the test are statistically significant, the effect size indicates that theymay not be practically significant. It might be the case that a very large sample was studied,driving up the test statistic value.16. In an ______, one sample is compared to a population for which we only know the meanduring hypothesis testing. Single-sample t test22. The critical cutoffs for a two-tailed, paired-samples t test with seven participants at a p levelof 0.01 are:-3.708 and 3.70824. Researchers were interested in whether relaxation training decreases the number ofheadaches a person experiences. They randomly assigned 20 participants to a control group or arelaxation training group and noted the change in number of headaches each group reported fromthe week before training to the week after training.
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:
1. Why do we divide by N - 1 rather than by N when estimating a population standard deviation from the sample standard deviation? 11. What mean is the confidence interval centered around in a single-sample
t test? 12. With very few degrees of freedom, the test statistic:
13. In a paired-samples t test, the null hypothesis posits that the mean
of the comparison distribution is:
Question 14 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.  Which of the following assumptions for the paired-samples t test is not met in  this research design? Select one: