Exam 21: Getting Started: Important Things to Learn First

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

The O in the DCOVA framework stands for "organize".

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 .

"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.

The C in the DCOVA framework stands for "categorize".

The C in the DCOVA framework stands for "collect".

The V in the DCOVA framework stands for "visualize".

"Big data" is a concrete concept with a precise operational definition.

The V in the DCOVA framework stands for "verify".

If rising temperatures are followed immediately by an increase in crime in urban areas,we would attribute the two events to be an instance of logical causality.

Problems may arise when statistically unsophisticated users who do not understand the assumptions behind the statistical procedures or their limitations are misled by results obtained from computer software.

Most analysts focus on the cost of tuition as the way to measure the cost of a college education.But incidentals,such as textbook costs,are rarely considered.A researcher at Drummand University wishes to estimate the textbook costs of first-year students at Drummand.To do so,she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $600 per semester.Identify the variable of interest to the researcher.

In the current data-driven environment of business,the decisions you make will be increasingly based on gut or intuition supported by personal experience.

Which of the following is not an attribute of big data?

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

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,the presentation and characterization of the two main measures calculated each day (i.e. ,average number of damaged oranges per tree and proportion of trees having damaged oranges)is 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 V in the DCOVA framework stands for "value".

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

Which of the following is an element of descriptive statistical problems?