Question 1

Determine which branch of statistics was used to make the following statement. In 2011, there were 34 deaths from the avian flu.

Accepted Answer

Descriptive statistics is used to describe, show or summarize data in a meaningful way such that, for example, patterns might emerge from the data. The statement about the number of deaths from avian flu in 2011 is a straightforward presentation of data, which is characteristic of descriptive statistics.

Question 2

A ______________ consists of all subjects that are being studied.

Accepted Answer

population

Question 3

If a weather center monitors and calculates the average number of tornadoes that pass through Topeka, Kansas each year, what type of variable would they be investigating?

Accepted Answer

The number of tornadoes that pass through a specific area each year is a random variable because it is a numerical outcome that results from a random phenomenon, in this case, weather patterns.

Question 4

A ______________ variable assumes values that can be counted.

Accepted Answer

The answer of A ______________ variable assumes values that can...

Question 5

Determine which branch of statistics was used to make the following statement. Because of the current economy, 49% of 18 to 34 year olds have taken a job to pay the bills.

Accepted Answer

Inferential statistics is used to make predictions or inferences about a population based on a sample of data. The statement about 49% of 18 to 34 year olds taking a job to pay the bills is likely derived from analyzing a sample and then inferring this percentage to the broader population, which is a key characteristic of inferential statistics.

Question 6

How are statistics important in our everyday lives, and why do we need to
understand them?

Accepted Answer

The answer of How are statistics important in our everyday...

Question 7

What is meant by a biased sample?

Accepted Answer

The answer of What is meant by a biased sample?...

Question 8

In which branch of statistics would a researcher acquire twenty-five 2000 Toyota Celicas, drive them until they had a major mechanical failure, record the final mileage,
And then write a report for Car and Driver?

Accepted Answer

Descriptive statistics involves collecting and summarizing data from a sample, such as recording the final mileage of the cars, to describe the characteristics of that sample.

Question 9

Inferential statistics is based on probability.

Accepted Answer

Inferential statistics uses probability to make predictions or inferences about a population based on a sample of data from that population.

Question 10

Determine which branch of statistics was used to make the following statement. Based on a sample of 2739 respondents, it is estimated that pet owners spent a total of 14
Billion dollars on veterinarian care for their pets.

Accepted Answer

The answer of Determine which branch of statistics was used...

Question 11

______________ is a decision-making process for evaluating claims about a
population, based on information obtained from samples.

Accepted Answer

The answer of ______________ is a decision-making process for evaluating...

Question 12

Each value in a data set may be referred to as either a data value or a(n) ____________.

Accepted Answer

A single value in a data set is often referred to as a "datum," which is the singular form of "data."

Question 13

Which of the following correctly describes the relationship between a sample and a population?

Accepted Answer

A sample is indeed a subset of individuals chosen from a larger set, the population, for the purpose of studying the population as a whole.

Question 14

Statistics is the science of conducting studies to

Accepted Answer

Statistics involves collecting, organizing, summarizing, analyzing, and drawing conclusions from data, which distinguishes it from other scientific methods that might focus on hypothesizing, experimenting, or solving equations.

Question 15

A ____________ is a characteristic or attribute of a subject that can assume different values?

Accepted Answer

A variable is a characteristic, number, or quantity that can be measured or quantified and can vary among subjects or over time.

Question 16

Determine which branch of statistics was used to make the following statement. In 2025, the world population is predicted to be 8 billion people.

Accepted Answer

The statement involves making a prediction about the future based on past and present data, which is a key aspect of inferential statistics.

Question 17

Based on her electric bills from last year, Mrs. Smith expects she will be paying
$75/month this year. This is an example of descriptive statistics.

Accepted Answer

The answer of Based on her electric bills from last...

Question 18

Determine which branch of statistics was used to make the following statement. In an online survey of 500 Virginia Tech students between spring 2010 and spring 2011, 31%
Said that they had missed class because of alcohol consumption.

Accepted Answer

The statement provides a summary of data collected from a survey without making predictions or generalizations to a larger population, which is characteristic of descriptive statistics.

Question 19

Variables with values that are determined by chance are called _____________.

Accepted Answer

Random variables are those whose values are determined by the outcomes of a random phenomenon.

Question 20

Which branch of statistics would employ probability to predict how many miles one should be able to drive a 2000 Toyota Celica during its lifetime?

Accepted Answer

Inferential statistics uses a sample of data to make inferences or predictions about a larger population. Predicting the lifetime mileage of a 2000 Toyota Celica based on probability and existing data falls under this category, as it involves making predictions about specific outcomes.

Quiz 1: The Nature of Probability and Statistics