Question 1

Which of the following is NOT a necessary component of a good statistical analysis?

Accepted Answer

Strong computational skills

Question 2

Why is it important to consider the source of data in a statistical study?

Accepted Answer

Because the source may have a special interest that could bias the results

Question 3

A survey is conducted by posting a question online and allowing anyone to respond. What type of sample is this?

Accepted Answer

Voluntary response sample

Question 4

Which of the following best describes the first step in preparing for a statistical analysis?

Accepted Answer

Identifying the context and goal of the study

Question 5

Why is random selection important in collecting sample data?

Accepted Answer

It ensures that the sample is representative of the population

Question 6

Which of the following questions should be asked when analyzing data?

Accepted Answer

All of the above

Question 7

A company wants to know if a new product improves customer satisfaction. Which of the following best describes the practical significance of the results?

Accepted Answer

The results have a meaningful impact on customer satisfaction

Question 8

Which of the following is a potential problem with using a voluntary response sample?

Accepted Answer

It may lead to biased results

Question 9

Suppose a survey is used to guide a political candidate’s campaign strategy. What is the main benefit of using surveys in this context?

Accepted Answer

Surveys provide insight into the opinions and views of voters

Question 10

Which of the following best describes statistical significance?

Accepted Answer

The results are unlikely to have occurred by random chance

Question 11

A researcher collects data from a group of volunteers who choose to participate in a study about exercise habits. What is a major limitation of this sampling method?

Accepted Answer

It may not represent the general population

Question 12

Which of the following steps should be performed before applying statistical methods to data?

Accepted Answer

Graph the data and explore for outliers

Question 13

If a study’s data are collected in a biased way, what is the likely outcome?

Accepted Answer

The data may be useless for statistical analysis

Question 14

Which of the following is an example of a question about the context of data?

Accepted Answer

What do the data represent?

Question 15

A researcher finds that a new medication reduces blood pressure by an average of 1 mmHg, with a p-value less than 0.01. Which of the following statements is true?

Accepted Answer

The result is statistically significant but may not be practically significant

Question 16

Which of the following best describes the role of technology in statistical analysis?

Accepted Answer

It is used to obtain results after exploring and graphing the data

Chapter 1: Introduction to Statistics – Foundations and Data Collection

Guida di studio - Domande di pratica

Study guide - Flashcard