Exam 1: Introduction

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 ________.

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 ________.

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the U.S.a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the possible responses to the question "How many out of every 10 U.S.voters do you think feel that the U.S.economy is in a good shape?" are values from a

Managers need an understanding of statistics to be able to present and describe information accurately,draw conclusions about large populations based on small samples,improve processes,and make reliable forecasts.

The level of satisfaction ("Very unsatisfied," "Fairly unsatisfied," "Fairly satisfied," and "Very satisfied")in a class is an example of a categorical variable.

The universe or "totality of items or things" under consideration is called

The Dean of Students conducted a survey on campus.Number of clubs,groups,teams,and organizations affiliated with on campus is an example of a ________ numerical variable.

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the U.S.a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the 2,150 adults make up

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the U.S.a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the possible responses to the question "How satisfied are you with the U.S.economy today with 1 = very satisfied,2 = moderately satisfied,3 = neutral,4 = moderately dissatisfied and 5 = very dissatisfied?" result in

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.How long a person has been a licensed driver is an example of a ________ numerical variable.

Which of the following is most likely a population as opposed to a sample?

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.

Which of the following is a discrete quantitative (numerical)variable?

The grade level (K-12)of a student is an example of a nominal scaled variable.

TABLE 1-1 The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a DVD player made by the company over the past 12 months are satisfied with their products. -Referring to Table 1-1,the possible responses to the question "How many DVD players made by other manufacturers have you used?" result in

A statistic is usually unobservable while a parameter is usually observable.

Marital status is an example of a numerical variable.

TABLE 1-1 The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a DVD player made by the company over the past 12 months are satisfied with their products. -Referring to Table 1-1,the possible responses to the question "Out of a 100 point score with 100 being the highest and 0 being the lowest,what is your satisfaction level on the videocassette recorder that you purchased?" are values from a

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.The two main measures calculated each day (i.e.,average number of damaged oranges per tree and proportion of trees having damaged oranges)may be used on a daily basis to estimate the respective true population ________.

TABLE 1-1 The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a DVD player made by the company over the past 12 months are satisfied with their products. -Referring to Table 1-1,the possible responses to the question "What is your annual income rounded to the nearest thousands?" are values from a