A Student Wanted to Quickly Construct a 95% Confidence Interval

question 114

Multiple Choice

A student wanted to quickly construct a 95% confidence interval for the average age of students in her statistics class. She randomly selected 9 students. Their average age was 19.1 years with a standard deviation of 1.5 years. What is the best point estimate for the population mean?

• A) 2.1 years
• B) 1.5 years
• C) 19.1 years
• D) 9 years
• E) 17.6 years

---

Definitions:

Social Psychology

The scientific study of how individuals think, feel, and behave in social contexts and how they are influenced by others.

Interpersonal

Relating to interactions and relationships between people.

Cognitive

Pertains to processes related to thinking, understanding, learning, and remembering.

Environmental

Pertaining to the natural world and the impact of human activity on its condition.