Deck 1: An Introduction to Business Statistics

Question 1

A random sample is selected so that on each selection from the population every unit remaining in the population has an equal chance of being chosen.

Answer 1

True

Question 2

In studying processes,we are interested in examining a characteristic that tells us about the _____ of output.

A)Random Sampling
B)Statistics
C)Variable
D)Quality

Answer 2

D

Question 3

Which of the following is a quantitative variable?

A)The make of a TV
B)A person's gender
C)Mileage of a car
D)Whether a person is a college graduate
E)Whether a person has a charge account

Answer 3

C

Question 4

Statistical methods help to:

A)Demonstrate the need for improvement
B)Identify ways to make improvements
C)Assess whether or not improvement activities have been successful
D)Estimate the benefits of improvement
E)All of the above

Question 5

Statistical inference is the science of using a sample of measurements to make generalization about the important aspects of a population of measurements.

Question 6

If we sample without replacement,we do not place the unit chosen on a particular selection back into the population.

Question 7

Temperature (in degrees Fahrenheit)is an example of a(n)________ variable.

A)Nominative
B)Ordinal
C)Interval
D)Ratio

Question 8

Jersey numbers of soccer players is an example of a(n)___________ variable.

A)Nominative
B)Ordinal
C)Interval
D)Ratio

Question 9

An example of a quantitative variable is the make of a car.

Question 10

The two types of quantitative variables are:

A)Ordinal and ratio
B)Interval and ordinal
C)Nominative and ordinal
D)Interval and ratio
E)Nominative and interval

Question 11

Ratio variables have the following characteristics:

A)Meaningful order
B)An inherently defined zero value
C)Categorical in nature
D)Predictable

Question 12

Which of the following is a categorical variable?

A)Air Temperature
B)Bank Account Balance
C)Daily Sales in a Store
D)Whether a Person Has a Traffic Violation
E)Value of Company Stock

Question 13

When we are choosing a random sample and we do not place chosen units back into the population,we are:

A)Sampling with Replacement
B)Sampling without Replacement
C)Using a Systematic Sample
D)Using a Voluntary Response Sample

Question 14

Weights of items obtained using a well-adjusted scale represents a(n)_____________ level of measurement.

A)Nominative
B)Ordinal
C)Interval
D)Ratio

Question 15

A population is a set of existing units.

Question 16

Measurements from a population are called

A)Statistics
B)Observations
C)Variables
D)Processes

Question 17

An example of a qualitative variable is the mileage of a car.

Question 18

By taking a systematic sample,in which we select every 100^th shopper arriving at a specific store,we are approximating a random sample of shoppers.

Question 19

A process is in statistical control if it does not exhibit any unusual variations.

Question 20

If we examine some of the population measurements,we are conducting a census of the population.

Question 21

A _____ is an examination of all the units in a population.

A)random sampling with replacement
B)random sampling without replacement
C)statistical inference
D)census

Question 22

_____ is the difference between a numerical description of the population and the corresponding description of the sample.

A)Variability
B)Statistical inference
C)Sampling error
D)Measurement error

Question 23

A ____ is a display of individual process measurements versus time.

A)runs plot
B)statistical analysis
C)random sample
D)measurement

Question 24

A(n)___________________ variable is a qualitative variable such that there is no meaningful ordering or ranking of the categories.

A)Ratio
B)Ordinal
C)Nominative
D)Interval

Question 25

The goal of _____ is to stabilize and reduce the amount of process variation.

A)Statistical Process Control
B)census taking
C)random sampling
D)statistical analysis

Question 26

In order to improve the quality of products and services,we must remove the root causes of process _____.

A)inference
B)variation
C)capability
D)changes

Question 27

The number of miles a truck is driven before it is overhauled is an example of a(n)_____________ variable.

A)Nominative
B)Ordinal
C)Interval
D)Ratio

Question 28

______________ is the science of using a sample to make generalizations about the important aspects of a population.

A)Statistical Process Control
B)Descriptive Statistics
C)Random sample
D)Statistical Inference

Question 29

A list of all of the units in a population is called _____.

A)Census
B)Frame
C)A sample
D)A variable

Question 30

A _____ is a list of all the units in a population.

A)census
B)frame
C)sample
D)variable

Question 31

A person's telephone area code is an example of a(n)_____________ variable.

A)Nominative
B)Ordinal
C)Interval
D)Ratio

Question 32

The process of assigning a value of a variable to each unit in a population or sample is called _____.

A)sampling
B)measurement
C)Statistical Process Control
D)observational analysis

Question 33

College entrance exam scores,such as SAT scores,are an example of a(n)________________ variable.

A)Ordinal
B)Ratio
C)Nominative
D)Interval

Question 34

Any characteristic of a population is called a _____.

A)set
B)process
C)variable
D)census

Question 35

__________ is a necessary component of a runs plot.

A)Observation over time
B)Qualitative variable
C)Random sampling of the data
D)Voluntary response data

Question 36

Statistical _____ refers to using a sample of measurements making generalizations about the important aspects of a population.

A)sampling
B)process control
C)analysis
D)inference

Question 37

Which one of the following sampling examples would generally lead to the least reliable statistical inferences about the population from which the sample has been selected?

A)A random sample selected without replacement.
B)A random sample selected with replacement.
C)A voluntary response sample.
D)A systematic sample.

Question 38

An identification of police officers by rank would represent a(n)____________ level of measurement.

A)Nominative
B)Ordinal
C)Interval
D)Ratio

Question 39

A _____ is a subset of the units in a population.

A)census
B)frame
C)sample
D)variable

Question 40

Any characteristic of a population unit is a(n):

A)Measurement
B)Sample
C)Observation
D)Variable

Question 41

A runs plot with an erratic pattern would indicate that the process is _____.

A)in control
B)out of control
C)random
D)fluctuating

Question 42

______ is a type of sampling method.

A)Systematic
B)Experimental
C)Observational
D)Process

Question 43

A process that is in statistical control does not necessarily imply that the process is __________.

A)statistically random
B)using a quantitative variable
C)observational
D)capable

Question 44

A set of existing units we wish to study is called a _____.

A)sample
B)frame
C)census
D)population

Question 45

In situations when it is not possible to number all of the units in a population,we often use a _____ sample to approximate a random sample.

A)random with replacement
B)systematic
C)random without replacement
D)statistical

Question 46

If a unit is placed back into the population after being selected for a sample,we are sampling _____.

A)without replacement
B)during replacement
C)with replacement
D)consistently

Question 47

A consumer's yes/no reply to a survey question is what type of variable?

A)Qualitative
B)Ratio
C)Random
D)Quantitative

Question 48

A _____ variable can have values that indicate into which of several segments of a population it belongs.

A)qualitative
B)quantitative
C)ratio
D)interval

Question 49

A _____ is used to help select items for a random sample.

A)runs plot
B)qualitative variable
C)ratio variable
D)random number table

Question 50

A sequence of operations that takes inputs and turns them into outputs is a _____.

A)process
B)statistical analysis
C)runs plot
D)random sampling

Question 51

_____ refers to describing the important aspects of a set of measurements.

A)Statistical Process Control
B)Runs plot
C)Descriptive statistics
D)Times Series plot

Question 52

The change in daily price of a stock is what type of variable?

A)Qualitative
B)Ordinal
C)Random
D)Quantitative

Question 53

A _____ variable can have values that are numbers on the real number line.

A)qualitative
B)quantitative
C)random
D)nominative

Question 54

In a voluntary response sample,what types of opinions are usually expressed?

A)Impartial
B)Random
C)Strong
D)Cross-sectional