How Many Observations Should Be Taken to Be 95% Confident

question 13

Multiple Choice

How many observations should be taken to be 95% confident of being within +5% of the actual time a machine is busy if it is believed that the machine is in use 75% of the time?

• A)1,200 observations
• B)772 observations
• C)364 observations
• D)289 observations

---

Definitions:

France

A country located in Western Europe known for its rich history, cultural influence, and contributions to art, philosophy, and cuisine.

Memory Performance

The effectiveness and efficiency with which an individual can retain and recall past experiences, information, or procedures, measured through various cognitive tests.

Organizational Strategies

Memory strategies in which materials to be remembered are mentally grouped into meaningful categories.

Liberian Children

refers to the youth population of Liberia, a country in West Africa, focusing on their social, educational, and health aspects.