- A frequency distribution in which scores are most frequent in the tails is said to be negatively skewed? TRUE/FALSE
- If the scores on a test have a mean of 12 and a standard deviation of 2, what is the z-score for a score of 12?
- What is the median of this set of data? 9,10,11,13,17,16,22,12,14,15
- If we found R2 = .32 which expression best describes the size of the effect?
- Ordinal level data are characterized by having equal intervals between each adjacent score. TRUE/FALSE
- The assumption of homogeneity of variance is met when the variance is the same as the inter-quartile range. TRUE/FALSE
- The Pearson correlation coefficient varies between 0 and 1. TRUE/FALSE
- What are the 3 ways you can confirm an independent t-test is statistically significant?
- Spearman’s rho is a test that should be used to assess the relationship between two ratio variables? TRUE/FALSE
- Describe a negative correlation.
- If you take the square root of the correlation coefficient you will have “the amount of variance accounted for” in one variable by the other variable. TRUE/FALSE
- If you would like to compare the means of several independent groups you should run an independent t-test. TRUE/FALSE
- When conducting a t-test to compare the means for two groups it is important to calculate an effect size to determine if the means are statistically different. TRUE/FASLE
- You do an Employee Engagement survey of 2500 employees and you get a mean Engagement score of 80 (out of 100), you calculate the Standard Deviation and find that it is 3. Answer the following questions
- What is the probability that someone will score 80 or higher?
- What is the probability that someone will score 75 or less?
- What percent of people scored between 60 and 70?
- What percent of people scored less than 50?
