The key difference between a positively skewed distribution and a negatively skewed distribution is

[example continued…] Sophia’s  Test                                             Blake’s Test   Sophia’s Score: 85                                    Blake’s Score: 88 Class Average: 80                                    Class Average: 86 Standard Deviation: 4                           Standard Deviation: 2   Convert Blake’s score into a score on Sophia’s test: 

What is the value of ΣX2 for the scores 7, 3, 6?

Manipulation and control are key components of a(n)

What is the range for the following set of scores? Scores: 4, 6, 11, 20

[example continued…] A researcher is interested in understanding the online shopping habits of college students in the US. To answer this question, the researcher conducts a survey of 200 randomly selected college students from across the US. Of these 200 students, 138 of them (69%) reported that they regularly shop online. The entire group of college students in the US is an example of a _________.

[example continued…] For the following frequency table: X f 5 5 4 5 3 2 2 3 1 5 What is the relative frequency (proportion) of the score X = 1? 

[example continued…] A researcher is interested in understanding the online shopping habits of college students in the US. To answer this question, the researcher conducts a survey of 200 randomly selected college students from across the US. Of these 200 students, 138 of them (69%) reported that they regularly shop online. If the goal of the study is to discover what percentage of college students in the US regularly shop online, that number would be an example of a _________.

A video player has 3 video quality settings: “low’, “medium” or “high”. What scale of measurement is being used to classify video quality?

What is the z score for X =100, μ = 90, σ = 5?