Exam 1: Introduction to Statistics

Statistics are used to market vitamins.

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

Statistics is commonly divided into two branches called descriptive statistics and summary statistics.

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

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

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 _______.

During the Valentine's 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?

Virtually all areas of business use statistics in decision making.

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 _______.

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?

A large manufacturing company in Indianapolis 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?

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?

The process of summarizing the data is called

Calculation of population parameters is usually either impossible or excessively time consuming and costly.

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

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 favorable opinion,and twenty-five reported an overall unfavorable opinion.The proportion,0.75,is a ___________.

Which types of data are normally used with nonparametric statistics?

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 __________________.

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