Exam 1: Introduction to Statistics

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 ___.

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

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 ___.

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

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

With interval-level data,the zero point is a matter of convention and does not mean the absence of the phenomenon under observation.

Manuel Banales,Marketing Director of Plano Power Plants,Inc.'s Electrical Division,is directing a study to identify and assess the relative importance of product features.Manuel directs his staff to design a survey questionnaire for distribution to all of Plano's 954 customers.For this study,the set of 954 customers is ___.

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 ___.

Gathering data from a sample to reach conclusions about the population from which the sample was drawn is called descriptive statistics.

The complete collection of all entities under study is called the sample.

Which of the following operations is meaningful for processing ordinal data,but is meaningless for processing nominal data?

Which types of data are normally used with nonparametric statistics?

A descriptive measure of the sample is called a statistic.

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

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?

The highest level of data measurement is the ratio level.

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

The lowest level of data measurement is ___.

A consumer has been asked to rank five cars based upon their desirability.This level of measurement is ___.

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