Question 1: A number of people took a test and achieved the distribution of scores represented below. What sorts of conclusions might you draw from the available frequency table, histogram, and summary statistics? (HINT: Think about concepts such as frequency, distribution of data, and mean/median/mode).

Question 2: In this data set, household income has been provided as both a scale variable (see the 1st histogram) and as the ordinal variable “income category” (see the 2nd histogram). Consider the two histograms, and discuss the pros and cons of presenting the data in one way vs. the other. Which histogram would you choose to represent the data, and why? (HINT: think of the “one-percenters” you hear about on the news.)

Question 3: Sixty seniors, with a mean age of 72 years, went through a rehabilitation program after hip replacement, knee replacement, or a stroke. This scatterplot illustrates correlation between “Grip Strength at Discharge” and “Total Discharge Score” for these seniors. What sorts of conclusions might you draw from the available scatterplot and correlation statistics? (HINT: Think about positive and negative relationships as well as ‘p’ values.)