Exam 1: Introduction to Statistics

Which of the following is not a random variable when flipping a coin?

A researcher wants to know what the average variation is in altimeters of small,privately owned airplanes.The task of determining this is expensive and time consuming,if even possible,given the large number of such airplanes. The researcher decides to use government records to randomly locate the owners of ten such planes and then get permission to test the altimeters.When the researcher is done,he will use the data gathered from the group of ten to reach conclusions about all small,privately owned airplanes.The average variation computed using the data gathered on the group of ten airplanes is best described as a _______.

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

You are the owner of a camping site and want to estimate the level of customer satisfaction among your clients.For this purpose,you select a representative sample of your clients and offer them a discount good for their next visit as compensation for filling out a short questionnaire.One question specifically says,"How satisfied are you with your experience,on a scale from (1)to (5),where (1)is 'very dissatisfied' and (5)is 'very satisfied'?" This is an example of _______.

A marketing survey is conducted to ascertain the potentiality of several new products. A series of focus groups is used to conduct this survey. At the end of one of the sessions,the group members are asked to rank the remaining eight products in order of desirability. A one indicates the most favored product and an eight is awarded to the least desirable. These numbers are examples of which level of data?

If it were not for the existence of an "absolute zero," ratio data would be considered the same as _______.

Nominal and ordinal data are sometimes referred to as quantitative data.

Measurements occur when a standard process is used to assign numbers to attributes or characteristics of a variable.

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 selecting a focus group of 40 industrial customers.For this study,the set of 40 industrial customers is ________.

Which types of data are normally used with nonparametric statistics?

On discovering an improperly adjusted drill press,Jack Joyner,Director of Quality Control,ordered an inspection of every fifth casting drilled during the evening shift.Jack is ordering a ___________________.

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

The Magnolia Swimming Pool Company wants to determine the average number of years it takes before a major repair is required on one of the pools that the company constructs. The president of the company asks Rick Johnson,a company accountant,to randomly contact fifty families that built Magnolia pools in the past ten years and determine how long it was in each case until a major repair. The information will then be used to estimate the average number of years until a major repair for all pools sold by Magnolia. The average based on the data gathered from the fifty families can best be described as a _______.

On discovering an improperly adjusted drill press,Jack Joyner,Director of Quality Control,ordered a 100% inspection of all castings drilled during the evening shift. Jack is ordering a ___________________.

A level of data measurement that has an absolute zero is called _______.

You are the owner of a camping site and want to evaluate the feasibility of opening earlier during the year.For this analysis,you obtain the average maximum and minimum local daily temperatures for early spring.This is an example of _______.

A business is attempting to find the best small town in the United States in which to relocate.As part of the investigation,the elevations of all small towns in the United States are researched.Some towns are located high in the Rockies with elevations over 8,000 feet.There are even some towns located in the south central valley of California with elevations below sea level.These elevations can best be described as which level of data?

A person has decided to code a particular set of sales data. A value of 0 is assigned if the sales occurred on a weekday,and a value of 1 means it happened on a weekend.This is an example of _______.

Rebecca Sear,Marketing Director of a regional restaurant chain,is directing a study to identify and assess the in-dining experience of the customers at one of the restaurants.She directs her staff to design a web-based market survey for distribution to all of the restaurant's 1265 customers who enjoyed a meal during the past 6 months.For this study,the set of 1265 customers is ________________.

A question in a survey of microcomputer users asked: "Which operating system do you use most often: a.Apple OS 7,b.MS DOS,c.MS Windows 95,d.UNIX." The measurement level for this question is _________________.