Question 1

Which of the following best defines 'statistics' as described in the study materials?

Accepted Answer

The science of collecting, organizing, analyzing, and interpreting data.

Question 2

A researcher wants to study the average test scores of all university students in a country. She selects 500 students from different universities to participate in her study. In this context, what is the 'sample'?

Accepted Answer

The 500 students selected for the study.

Question 3

Which of the following is an example of a parameter?

Accepted Answer

The average height of all adult women in a city.

Question 4

A teacher records the letter grades (A, B, C, D, F) of students in her class. What type of data is she collecting?

Accepted Answer

Qualitative data

Question 5

Which of the following variables is measured on a ratio scale?

Accepted Answer

The number of books a student owns

Question 6

A survey asks respondents to indicate their level of agreement with a statement on a scale from 1 (strongly disagree) to 5 (strongly agree). What type of scale is this?

Accepted Answer

Ordinal scale

Question 7

Which of the following best describes a statistic?

Accepted Answer

A numerical measurement describing a sample.

Question 8

A researcher collects the ages of participants in a study. Which type of data is this?

Accepted Answer

Quantitative data

Question 9

Which of the following is an example of data measured on a nominal scale?

Accepted Answer

Types of cuisine (Italian, Chinese, Mexican, Indian)

Question 10

A scientist wants to generalize her findings from a sample to the entire population. Which type of statistics is she using?

Accepted Answer

Inferential statistics

Question 11

Which of the following statements about interval scales is correct?

Accepted Answer

Interval scales have equal intervals but no true zero point.

Question 12

A hospital administrator wants to summarize the average length of stay for patients last year. Which type of statistics should be used?

Accepted Answer

Descriptive statistics

Question 13

Which of the following best describes a population in statistical terms?

Accepted Answer

The entire set of individuals or items being studied.

Question 14

A researcher is interested in the effect of a new drug on blood pressure. She randomly assigns 100 patients to receive the drug and measures their blood pressure after 6 weeks. What is the sample in this study?

Accepted Answer

The 100 patients who received the drug.

Question 15

Which of the following is NOT a characteristic of ratio data?

Accepted Answer

It has no true zero point.

Question 16

A study reports that 60% of surveyed college students prefer online classes. What is this value an example of?

Accepted Answer

A statistic

Question 17

Which of the following best describes the difference between descriptive and inferential statistics?

Accepted Answer

Descriptive statistics summarize data; inferential statistics make predictions or generalizations.

Question 18

A researcher assigns numbers to different brands of smartphones (1 for Apple, 2 for Samsung, 3 for Google, etc.) for analysis. What type of scale is being used?

Accepted Answer

Nominal scale

Question 19

Which of the following is an example of ordinal data?

Accepted Answer

Finishing positions in a marathon (1st, 2nd, 3rd, etc.)

Question 20

A nutritionist collects data on the types of diets (vegetarian, vegan, omnivore, pescatarian) followed by 200 adults. What type of data is this?

Accepted Answer

Qualitative data

Introduction to Statistics: Data Collection and Key Concepts

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