Exam 1: Introduction to Statistics

Which of the following statements about business statistics is not true?

All numerical data must be analyzed statistically in the same way because all of them are represented by numbers.

Statistics are used to market vitamins.

Which of the following statements is correct?

What proportion of San Diego's registered voters favor trade restrictions with China? In an effort to determine this, a research team calls every registered voter in San Diego and contacts them. The proportion determined from the data gathered is a ___.

Variables and measurement data are interchangeable terms.

Sue Taylor, Director of Global Industrial Sales, is concerned by a deteriorating sales trend. Specifically, the number of industrial customers is stable at 1,500, but they are purchasing less each year. She orders her staff to search for causes of the downward trend by surveying all 1,500 industrial customers. For this study, the set of 1,500 industrial customers is ___.

The Universal Pulp Company has a plant in Portland, Oregon. Management wants to determine the average number of sick days taken per worker in this plant in 2012. To do this, the management gathers records on all the workers in the plant and averages the number of sick days taken in 2012 by each worker. This process is using ___.

Which of the following is $\textbf{ not }$ a key element of statistics?

Virtually all areas of business use statistics in decision making.

Jessica Salas, president of Salas Products, is reviewing the warranty policy for her company's new model of automobile batteries. Life tests performed on a sample of 100 batteries indicated an average life of seven years under normal usage. Jessica recommended a six-year warranty period for the new model. This is an example of ___.

Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system, and orders an inspection of "every tenth payroll voucher issued since January 1, 2013." Pinky is ordering a ___.

When a person collects information from the entire population, this is called a ___.

Sue Taylor, Director of Global Industrial Sales, is concerned by a deteriorating sales trend. Specifically, the number of customers is stable at 1,500, but they are purchasing less each year. She orders her staff to search for causes of the downward trend by selecting a focus group of 40 industrial customers. Sue is ordering a ___.

In statistics, conducting a survey means

Miguel Hernandez, Senior Vice President of Human Resources at Memorial Hospital, is exploring the usage of nursing over-time hours in the emergency department during the last operating year (January 1, 2012, through December 31, 2012). Miguel intends to survey the emergency department nurses regarding their perception of over-time needs. For this survey y the set of all emergency department nurses who worked at Memorial Hospital during the last operating year is ___.

Which of the following measurement processes is least likely to yield usable data?

The process of summarizing the data is called

A variable is a quantity that describes each of the possible outcomes of an experiment.

A cancer research group was interested in determining the percentage of women 40 years or older that have regularly scheduled mammograms. To accomplish this, they surveyed 500 women in this age group and based on 155 women that responded affirmatively, estimated the percentage of all women in this age group that have regularly scheduled mammograms. This process is an example of ___.