Under what circumstances can a very small treatment effect be statistically significant?

Which of the following actions will always change the value of the mean?

If all the possible random samples with n = 36 scores are selected from a normal population with  µ = 80 and σ = 18, and the mean is calculated for each sample, then what is the average of all the sample means?

What kind of frequency distribution graph shows the frequencies as bars, with no space between adjacent bars?

In an independent-measures hypothesis test, what must be true if t = 0?

For a sample of n = 30 scores, X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00.  What are the values for the sample mean and standard deviation?

A researcher is interested in whether laundry detergent containers contained 100 oz of detergent as claimed by the manufacturer. The researcher collects 100 samples of laundry detergent and measures the amount of detergent. What test is most appropriate to use to analyze this data?

Which of these is NOT involved in calculating a one-factor between-subjects ANOVA?

What is the mode for the following sample of n = 8 scores?  Scores:  0, 1, 1, 1, 2, 2, 3, 3

If sample variance is computed by dividing SS by n, then the average value of the sample variances from all the possible random samples will be ____ the population variance.