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For a negatively skewed distribution with a mode of X = 25 and a median of 20, what is the most likely value for the mean?

Over the course of a semester, eight students take their exams with Essential Oil Blend 1 being diffused in the testing area during Exam 1, Essential Oil Blend 2 during Exam 2, and Essential Oil Blend 3 during Exam 3. What is the dftotal for the ANOVA hypothesis test?

Which of the following is true about correlation?

A sample of n = 9 college students is used to evaluate the effectiveness of a new Study Skills Workshop.  Each student’s grade point average (GPA) is recorded for the semester before the workshop and for the semester after the workshop.  The average GPA improved by MD = 0.60 points with s2 = 0.09.  The researcher would like to use the sample to estimate how much effect the workshop would have for the entire college population.  Which of the following is the 80% confidence interval for these data?

A sample of difference scores has a mean of 5 with a variance of 100.  If effect size is measured using Cohen’s d, what is the value of d?

A characteristic, usually a numerical value, that describes a sample is called a ____.

Which combination of factors is most likely to produce a small value for the F-ratio?

An independent-measures research study compares three treatment conditions using a sample of 5 in each treatment.  For this study, the three samples have SS1 = 10, SS2 = 20, and SS3 = 15.  What value would be obtained for MSwithin?

A population has SS = 100 and s2 = 4.  What is the value of Σ(X – M) for the population? Hint: Think about what these symbols imply, you are summing the deviation scores. What does this always equal?

For a population with µ = 80 and s = 6, what is the z-score corresponding to X = 68?