Exam 32: Lets Get Started Big Things to Learn First

True or False: The O in the DCOVA framework stands for "operationalize."

The Human Resources Director of a large corporation wishes to develop an employee benefits package and decides to select 500 employees from a list of all (N = 40,000)workers in order to study their preferences for the various components of a potential package.In this study,methods that result in decisions concerning population characteristics based only on the sample results are called ________.

Those methods involving the collection,presentation,and characterization of a set of data in order to properly describe the various features of that set of data are called

A study is under way in Yosemite National Forest to determine the adult height of American pine trees.Specifically,the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall.It is estimated that the forest contains 25,000 adult American pines.The study involves collecting heights from 250 randomly selected adult American pine trees and analyzing the results.Identify the variable of interest in the study.

The process of using data collected from a small group to reach conclusions about a large group is called

True or False: The C in the DCOVA framework stands for "collect."

The Human Resources Director of a large corporation wishes to develop an employee benefits package and decides to select 500 employees from a list of all (N = 40,000)workers in order to study their preferences for the various components of a potential package.In this study,methods involving the collection,presentation,and characterization of the data are called ________.

True or False: The A in the DCOVA framework stands for "analyze."

True or False: Compiling the number of registered voters who turned out to vote for the primary in Iowa is an example of descriptive statistics.

True or False: A professor computed the sample average exam score of 20 students and used it to estimate the average exam score of the 1,500 students taking the exam.This is an example of inferential statistics.

True or False: "Big data" is a concrete concept with a precise operational definition.

The oranges grown in corporate farms in an agricultural state were damaged by some unknown fungi a few years ago.Suppose the manager of a large farm wanted to study the impact of the fungi on the orange crops on a daily basis over a 6-week period.On each day a random sample of orange trees was selected from within a random sample of acres.The daily average number of damaged oranges per tree and the proportion of trees having damaged oranges were calculated.In this study,drawing conclusions on any one day about the true population characteristics based on information obtained from the sample is called ________.

True or False: Using the number of registered voters who turned out to vote for the primary in Iowa to predict the number of registered voters who will turn out to vote in Vermont's primary is an example of descriptive statistics.

The collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm is an example of

True or False: The V in the DCOVA framework stands for "verify."

True or False: The O in the DCOVA framework stands for "organize."

True or False: The D in the DCOVA framework stands for "data."

The estimation of the population average family expenditure on food based on the sample average expenditure of 1,000 families is an example of

True or False: The V in the DCOVA framework stands for "visualize."

True or False: "Big data" are data being collected in huge volumes and at very fast rates,and they typically arrive in a variety of forms,organized and unorganized.