Question 1

Descriptive: inferential as

Accepted Answer

Descriptive statistics summarize data, while inferential statistics account for chance and make predictions or inferences about a population based on a sample.

Question 2

The purpose of descriptive statistics is to

Accepted Answer

Descriptive statistics are used to organize and summarize data, making it easier to understand and interpret. They do not involve making inferences or predictions, which are the focus of inferential statistics.

Question 3

The branch of statistics concerned with chance factors associated with drawing a sample is known as

Accepted Answer

Inferential statistics involves making predictions or inferences about a population based on a sample, and it deals with chance factors and uncertainty.

Question 4

The idea of a random sample is particularly important for

Accepted Answer

The idea of a random sample is particularly important for statistical inference because it allows us to make generalizations about a population based on a sample.

Question 5

Suppose we are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School.
-The set of test scores for these children constitutes

Accepted Answer

The set of test scores for all currently enrolled students at Edison Elementary School represents a population because it includes the entire group of interest.

Question 6

Suppose we are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School.
-The set of test scores for Miss Grady's class constitutes

Accepted Answer

The set of test scores for Miss Grady's class is a sample because it represents a subset of the entire population of students at Edison Elementary School.

Question 7

Suppose we are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School.
-The average score of Miss Grady's class is a

Accepted Answer

The answer of Suppose we are interested in the average...

Question 8

Suppose we are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School.
-The average score of all students in Edison School is a

Accepted Answer

The average score of all students in Edison School is a parameter because it describes a characteristic of the entire population of students at the school.

Question 9

Parameter is to population as ____________ is to sample

Accepted Answer

A parameter describes a characteristic of a population, while a statistic describes a characteristic of a sample.

Question 10

In an experiment, the variable that is manipulated by the investigator is called the

Accepted Answer

The independent variable is the variable that is manipulated by the investigator.

Question 11

In an experiment, the dependent variable is

Accepted Answer

The dependent variable is the one that is measured in an experiment to assess the effect of changes in the independent variable.

Question 12

A research question is one that is about

Accepted Answer

A research question is specifically about the subject matter under investigation, guiding the focus and direction of the study.

Question 13

A statistical question

Accepted Answer

A statistical question is typically developed from a research question as it is designed to address specific aspects of the research inquiry using statistical methods.

Question 14

In the ordinary course of investigation, statistical matters

Accepted Answer

The answer of In the ordinary course of investigation, statistical...

Question 15

Which of the following recorded values is best viewed as a discrete variable?

Accepted Answer

A count of 36 telephones is a discrete variable because it represents a countable number of items, whereas the other options involve measurements that can take on a continuous range of values.

Question 16

Scores for which of the following variables would necessarily be approximate numbers?

Accepted Answer

Arm length is a continuous variable that can take on any value within a certain range. When measuring arm length, it is not possible to obtain an exact measurement, so the result will always be an approximation.

Question 17

Once a set of measurements is recorded, they form a

Accepted Answer

A discrete series is a set of measurements that can only take on certain values. For example, the number of people in a room can only be a whole number. A continuous series is a set of measurements that can take on any value within a certain range. For example, the temperature of a room can be any value between 0 and 100 degrees Celsius. A set of exact numbers is a set of measurements that are known to be exact. For example, the number of days in a year is 365. A population is a group of individuals that are being studied. For example, the population of the United States is all of the people who live in the United States.

Question 18

If the weight of three objects is reported to be 97.0 pounds, their average weight (97.0/3) should be reported as

Accepted Answer

The answer of If the weight of three objects is...

Question 19

A researcher is interested in studying hand-eye coordination of second-grade boys at Honey Island Elementary School. She selects four boys for study and finds that they all receive the same score. In this study, hand-eye coordination is

Accepted Answer

Hand-eye coordination is a quantitative variable because it can be measured on a numerical scale. In this study, the researcher found that all four boys received the same score, which means that hand-eye coordination is a quantitative constant.

Question 20

A marketing analyst surveys the brand of cola drink preferred by adult women. Brand of cola drink is

Accepted Answer

Brand of cola drink is a qualitative variable because it is a categorical variable that cannot be measured numerically.

Quiz 1: Introduction