Exam 1: Introduction to Statistics

Interval- and ratio-level data are sometimes referred to as quantitative data.

A market research analyst has asked consumers to rate the appearance of a new package on a scale of 1 to 5.A 1 means that the appearance is awful while a 5 means that it is excellent.The level of this data is usually considered ___.

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 to all of Plano's 954 customers.Manuel is ordering a ___.

Members of the accounting department's clerical staff were asked to rate their supervisor's leadership style as either (1)authoritarian or (2)participatory.This is an example of ___.

Explain the difference between variables,measurement,and data.

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 ___.

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 student makes an 82 on the first test in a statistics course.From this,she estimates that her average at the end of the semester (after other tests)will be about 82.This is an example of ___.

The lowest level of data measurement is the ratio level.

The Cascades Inc.has a plant in Barrie,Ontario.Management wants to determine the average number of sick days taken per worker in this plant in 2013.To do this,the management gathers records on all the workers in the plant and averages the number of sick days taken in 2013 by each worker.This process is using ___.

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 selecting a focus group of 40 industrial customers.Sue is ordering a ___.

Compare the four different levels of data: nominal,ordinal,interval,and ratio.

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.Less than 1% of the castings were defective,so Jack released the evening shift's production to assembly.This is an example of ___.

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

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

All numerical data must be analyzed statistically in the same way because all of them are represented by numbers.

A portion or subset of the entities under study is called the statistic.

A market researcher is interested in determining the average income for families in Simcoe County,Ontario.To accomplish this,she takes a random sample of 400 families from the county and uses the data gathered from them to estimate the average income for families of the entire county.This process is an example of ___.

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 ___.

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