Exam 1: Introduction to Statistics

Numbers which are used to rank-order the performance of workers represent data measured at the interval level.

The social insurance number of employees would be an example of what level of data measurement?

Sales of a restaurant (in dollars)are an example of what level of data measurement?

Which scale of measurement has these two properties: linear distance is meaningful and the location of origin (or zero point)is arbitrary?

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 basis for inferential statistics is the ability to make decisions about population parameters without having to complete a census of the population.

A marketing demographic survey is undertaken to determine the market potential for a new product.One of the questions asked is: What type of residence do you live in? Respondents are offered several possible answers including: house,apartment,or condominium.In order to computerize the survey answers,the responses are coded as a 1 if the answer is "house",a 2 if the answer is an "apartment",and a 3 if the answer is a "condominium".These numbers,1,2,and 3,are examples of which level of data?

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 ___.

The Chamber of Commerce wants to assess its membership's opinions of the North American Free Trade Agreement.One-hundred of the 2,000 members are randomly selected and contacted by telephone.Seventy-five reported an overall favourable opinion,and twenty-five reported an overall unfavourable opinion.The proportion,0.75,is a ___.

Using data from a group to generalize to a larger group involves the use of ___.

During the Valentine season,different offices in a company are encouraged to decorate their doors.A committee then goes around and ranks the doors according to how well the doors are decorated.The best door gets a ranking of "1";the second best gets a ranking of "2",etc.The numbers of these rankings represent which level of data?

Manuel Banales,Marketing Director of Plano Power Plants,Inc.'s Electrical Division,is leading a study to identify and assess the relative importance of product features.Manuel directs his staff to design a survey questionnaire and distribute it 100 of Plano's 954 customers.Manuel is ordering a ___.

A census is the process of gathering data on all the entities in the population.

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

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 contacts them.The proportion determined from the data gathered is a ___.

How much inventory do Christmas tree sales lots keep? A researcher goes from location to location around the city counting the number of trees in each lot.These numbers most likely represent what level of data?

Marc Fortier,Director of Human Resources,is exploring the causes of employee absenteeism at Lennoxville Bottling during the last operating year (January 1,2013 through December 31,2013).For this study the set of all employees who worked at Batesville Bottling during the last operating year is ___.

Numbers which are used to classify or categorize the observations represent data measured at the nominal level.

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 ___.