Exam 3: Graphical Descriptive Techniques 2

Electronics Company At a meeting of regional offices managers of a national electronics company,a survey was taken to determine the number of employees the regional managers supervise in the operation of their departments.The results of the survey are shown below. ​ ​ ​ -{Electronics Company Narrative} What proportion of managers supervises 3 employees?

Which of the following statements about histograms is false?

Observations that are measured at successive points in time is what type of data?

In applications involving two variables,X and Y,where one variable depends to some degree on the other,we call Y the ____________________ variable.

Can a scatter diagram be used to explore the relationship between two nominal variables? Explain why or why not.

If when one variable increases the other one also increases,we say that there is a(n)____________________ relationship between these two variables.

Data for calories and salt content (milligrams of sodium)in 17 brands of meat hot dogs are shown in the scatter diagram below.According to this diagram,it appears that hot dogs that are high in sodium are generally low in calories,and hot dogs with low sodium are generally high in calories.

A bar chart can be made to look deceptive if the Y-axis starts at a number other than zero.

Insurance Company A representative from a local insurance agency selected a random sample of insured homeowners and recorded the number of claims made in the last three years,with the following results: ​ ​ ​ ​ -{Insurance Company Narrative} How many total claims are represented in the sample?

The intervals (classes)in a histogram are equally wide.

In a histogram a(n)____________________ class is the one with the largest number of observations.

What type of graph depicts the data below?

Which of the following describes the shape of the histogram below?

Admission to ER The following bar chart shows the type of aspirin (if any)given to 100 cardiac patients within 15 minutes of their admission to the emergency room. -{Admission to ER Narrative} In what way does the original bar chart distort the data as compared to a bar chart that starts at zero on the Y-axis (frequency axis)?

We create a frequency distribution for interval data by counting the number of observations that fall into each of a series of intervals,called ____________________.

The two most important characteristics revealed by the scatter diagram are the strength and direction of the linear relationship.