A population is a set of existing units.

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

population.

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.

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

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

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

Statistical inference is the science of using a sample of measurements to make generalization about the

important aspects of a population of measurements.

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

the population.

By taking a systematic sample, in which we select every 100th shopper arriving at a specific store, we

are approximating a random sample of shoppers.

Statistical methods help to:

Ratio variables have the following characteristics:

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

we are:

Which of the following is a quantitative variable?

Which of the following is a categorical variable?

Measurements from a population are called

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

output.

The two types of quantitative variables are:

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

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

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

measurement.

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

measurement.

__________ is a necessary component of a runs plot.

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

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

variable.

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

variable.

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(n) ___________________ variable is a qualitative variable such that there is no meaningful

ordering or ranking of the categories.

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

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

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

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

_____.

Any characteristic of a population is called a _____.

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

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

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

description of the sample.

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

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

_____.

A ____ is a display of individual process measurements versus time

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

aspects of a population.

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

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

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

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

belongs.

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

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

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 runs plot with an erratic pattern would indicate that the process is __

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

_____.

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

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

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

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

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

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