Week 3 Problems
1. An industrial group reports that there were approximately 122,000 industrial robots operating in a region last year. The graph shows the percentages of industrial robot units assigned to each of six task categories.
Complete parts a through e bellow.
a. What type of graph is used to describe the data?
A. Pie chart
B. Bar graph
C. Pareto diagram
b. Identify the variable measured for each of the 122,000 industrial robots
A. Percentage of industrial robots
B. Number of industrial robots
C. Efficiency of each industrial robot
D. Task of each industrial robot
c. Use the graph to identify the task that uses the lowest percentage of industrial robots
A. Arc welding
B. Assembly
C. Material handling
D. Material removal
E. Dispensing/coating
F. Spot welding
d. How many of the 122,000 industrial robots are used for assembly?
6100 industrial robots
e. What percentage of industrial robots are used for either arc welding or dispensing/coating?
43%
2. In one university, language professors incorporated a 10-week extensive readings program to improve students' Japanese reading comprehension. The professor collected 262 books originally written for Japanese children and required their students to read at least 40 of them as part of the grade in course. The books were categorized into reading levels (color-coded for easy selection) according to length and complexity. Complete parts a trough c.
a. Compute the relative frequencies in each category.
Reading Level Relative frequency