Practice Problems (Graphs, Charts, and Tables - Describing your Data) 1. Wendi is an Industrial Organizational Psychologist who wants to study the relationship between experiencing workplace psychological aggression from coworkers and perceptions of self-efficacy (perceptions of your own effectiveness on the job). To test this hypothesis, Wendi randomly selects n = 7 employees from a local public transportation agency and asks them to respond to the following questions (the questions and response scales are only there to make sense of the data in the table), with the following results (use for a. - d.): Not at All Confident 2. Please rate the extent to which you experience rude, disrespectful, and/or intimidating treatment from coworkers or management at work. Aggression 5 1 2 4 6 3 1 SelfEfficacy 2 5 3 1 1 5 6 Not Sure Confident Very Confident Extremely Confident 1 2 3 4 5 6 Never 1. How confident are you in your capability to organize and execute the courses of action required to manage prospective situations in your job? Somewhat Confident Occasionally Sometime s Often Most Times All the Time 1 2 3 4 5 6 a. Use the data on aggression and self-efficacy to create a scatter diagram. b. What is the strength of this relationship? c. What is the direction of this relationship? d. Describe this relationship in Plain English. Practice Problems (Graphs, Charts, and Tables - Describing your Data) Page 1 2. Jon is a reporter for the Las Vegas Review Journal who is writing a story on the age-based diversity of NSC students. He collects data on a sample of n = 20 students with the data below (use for a. - c.). 22, 35, 43, 18, 21, 55, 52, 41, 29, 27, 33, 19, 38, 21, 28, 30, 25, 44, 27, 19 a. Create the appropriate frequency distribution table to summarize this data. b. Create the appropriate frequency distribution graph to summarize this data. c. Based on your frequency distribution table and graph, what can you say about the age-based diversity of NSC students? Practice Problems (Graphs, Charts, and Tables - Describing your Data) Page 2 3. Jon is a reporter for the Las Vegas Review Journal who is writing a story on the ethnic diversity of NSC students. He collects data on a sample of 20 students with the data below (use for a. - c.). White White White White White White White White Hispanic Hispanic Hispanic Hispanic Hispanic Pacific Islander Asian Asian Two or More Ethnicities Black or African Black or African Black or African a. Create the appropriate frequency distribution table to summarize this data. b. Create the appropriate frequency distribution graph to summarize this data. c. Based on the ethnic composition of the population of NSC students (see bottom left of http://nsc.edu/8849.asp, select ethnicity for Background/Demographics), did Jon get a representative sample? Explain. Practice Problems (Graphs, Charts, and Tables - Describing your Data) Page 3 4. The Call Center Manager at Netflix randomly surveyed 60 customers throughout the day and asked each one to rate the quality of service. The Call Center Manager also tracked the time of day that the customer called. Use the data below for a. - b. Rating Very Good Time Morning Rating Very Good Good Morning Fair Poor Morning Fair Very Good Morning Very Good Very Good Morning Good Good Morning Fair Very Good Morning Very Good Very Good Morning Very Good Fair Morning Very Good Fair Morning Fair Very Good Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Very Good Poor Very Good Good Very Good Fair Very Poor Very Good Very Poor Time Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Afternoo n Rating Very Good Time Evening Rating Very Poor Time Evening Good Evening Very Poor Evening Very Good Evening Very Good Evening Fair Evening Very Poor Evening Very Good Evening Very Good Evening Fair Evening Good Evening Very Good Evening Good Evening Fair Evening Very Good Evening Very Good Evening Poor Evening Fair Evening Fair Evening Good Evening Very Good Evening Good Evening Fair Evening Fair Evening Very Good Evening Fair Evening Fair Evening Poor Evening Fair Evening a. Use the data to construct the appropriate frequency distribution table for examining differences in satisfaction based on shift time. Practice Problems (Graphs, Charts, and Tables - Describing your Data) Page 4 b. Briefly describe the difference in satisfaction levels across the shifts based on the frequency distribution table you created. Practice Problems (Graphs, Charts, and Tables - Describing your Data) Page 5