Exam 2: Charts and Graphs

A shirt production company has tracked their sales of red and blue shirts over the past few years.The graph of both is shown below. Which of the following is a true statement about the trends in sales?

Consider the following stem and leaf plot: Stem Leaf 1 0, 2, 5, 7 2 2, 3, 4, 8 3 0, 4, 6, 6, 9 4 5, 8, 8, 9 5 2, 7, 8 Suppose that a frequency distribution was developed from this, and there were 5 classes (10-under 20, 20-under 30, etc.).What would be the relative frequency of the class 20-under 30?

A frequency distribution was developed.The lower endpoint of the first class is 9.30, and the midpoint is 9.35.What is the upper endpoint of this class?

The number of phone calls arriving at a switchboard each hour has been recorded, and the following frequency distribution has been developed: Class Interval Frequency 20-under 40 30 40-under 60 45 60-under 80 80 80-under 100 45 What is the relative frequency of the second class?

A cumulative frequency polygon is also called an ogive.

In a histogram, the tallest bar represents the class with the highest cumulative frequency.

According to the following graphic, "Bent Pins" account for ___% of PCB Failures.

The difference between the highest number and the lowest number in a set of data is called the differential frequency.

An instructor has decided to graphically represent the grades on a test.The instructor uses a plus/minus grading system (i.e.she gives grades of A-, B+, etc.).Which of the following would provide the most information for the students?

The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school: Salary Number of Graduates ($1,000s) 18-under 21 - 21-under 25 - 24-under 27 - 29-under 30 - Before data was collected, someone questioned the validity of this arrangement.Which of the following represents a problem with this set of intervals?

Abel Alonzo, Director of Human Resources, is exploring employee absenteeism at the Harrison Haulers Plant during the last operating year.A review of all personnel records indicated that absences ranged from zero to twenty-nine days per employee.The following class intervals were proposed for a frequency distribution of absences: Absences Number of Employees (Days) 0-under 5 - 5-under 10 - 10-under 15 - 20-under 25 - 25-under 30 - Which of the following represents a problem with this set of intervals?

Sales are tracked during the past year in the graph below. What would be the most effective strategy to allow management to more clearly discern monthly trends in sales?

The cumulative frequency for a class is 27.The cumulative frequency for the next (non-empty)class will be ___.

Consider the relative frequency distribution given below: Class Interval Relative Frequency 20-under 40 0.2 40-under 60 0.3 60-under 80 0.4 80-under 100 0.1 There were 60 numbers in the data set.How many numbers were in the interval 40-under 60?

The following graphic of residential housing data (selling price and size in square feet)indicates ___.

The number of phone calls arriving at a switchboard each hour has been recorded, and the following frequency distribution has been developed: Class Interval Frequency 20-under 40 30 40-under 60 45 60-under 80 80 80-under 100 45 What is the midpoint of the last class?

A retail shoe company would like to consider key elements that might impact the sales related a specific store's location in the town.If placed on a scatter plot, which two variables would be helpful in helping management with this information?

The following graphic of PCB Failures is a ___.

The following graphic of cigarettes smoked (sold)per capita (CIG)and deaths per 100K population from lung cancer (LUNG)indicates _________

Time-series data should be shown from oldest time period to the most recent.