Exam 1: Introduction to Statistics

A marketing survey is conducted to discover 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 favoured product and an eight is awarded to the least desirable.These numbers are examples of which level of data?

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, the data gathered from the group of ten will be used 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 ___.

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 ___.

A statistics instructor collects background information on the students.About 30% of the students have taken economics and about 40% have taken accounting.There are 23 male students and 27 female students in this class.This is an example of ___.

A business manager is looking to hire someone who can use large data sets to create business models that can then be used to help the manager make better decisions.The manager is looking to hire someone with _____________.

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 ___.

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 the data gathered from the group of ten will be used to reach conclusions about all small, privately owned airplanes.This process can best be described as ___.

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 surveying all 1,500 industrial customers.Sue is ordering a ___.

The CFO of a mid-level investment firm reports that the company has lost thousands of dollars through its data mining process due to poor data accuracy and quality.She is addressing an issue related to:

A large manufacturing company in Sarnia produces valves for the chemical industry.According to specifications, one particular valve is supposed to have a five-inch opening on the side.Quality control inspectors take random samples of these valves just after the hole is bored.They measure the size of the hole in an effort to determine if the machine is out-of-adjustment.The measurement of the diameter of the hole represents which level of data?

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, however 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.One question on the survey asked the customers: "Which of the following best describes your primary business: a.manufacturing, b.wholesaler, c.retail, d.service." The measurement level for this question is ___.

A company is concerned that the data it has acquired has become so large that its practical use is severely limited)They decide to extract patterns from its present data, increasing its essential value).This is an example of:

The lowest level of data measurement is ___.

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

Marc Fortier, Director of Human Resources, is exploring the causes of employee absenteeism at Lennoxville Bottling during the last operating year.Personnel records for 50 of the plant's 250 employees are selected for analysis.For this study, the group of 50 employees is a ___.

Which of the following operations is meaningful for processing nominal data?

A company has collected data that they believe will help them identify the characteristics of their top customers.After some analysis, it is discovered that they need data on the age and income of these customers.Therefore, the company needs data that has more ____________

Law School Admission Test (LSAT)scores are an example of what type of measurement scale?

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

You are the owner of a camping site and want to estimate the average age of your customers.For this purpose, you select a representative sample of your clients and offer them a discount on their next visit as compensation for filling out a short questionnaire that includes relevant age intervals: "Your age is (a)30 or younger, (b)30 to 40, (c)40 to 50, (c)50 to 60, (d)60 or older." This is an example of _______.