We Intend to Estimate the Average Driving Time of a Group

question 64

Multiple Choice

We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the average time is 42 minutes with a standard deviation of 12 minutes. We want our 98 percent confidence interval to have a margin of error of no more than plus or minus 3 minutes. What is the smallest sample size that we should consider?

• A) 87
• B) 10
• C) 8
• D) 261

---

Definitions:

Day Care

A service that provides care and supervision for children during the day, particularly while parents are at work.

Cross-Cultural

Pertains to or comparing different cultures or the comparison of different societal norms and values.

Parenting

The activity of raising and nurturing children by promoting their physical, emotional, social, and intellectual development.

Infants

Young children in the earliest stage of life, typically considered from birth to one year of age, marked by rapid physical growth and developmental milestones.