A Statistician Wants to Estimate the Mean Weekly Family Expenditure

question 22

Essay

A statistician wants to estimate the mean weekly family expenditure on clothes. He believes that the largest weekly expenditure is $650 and the lowest is $150.
a. Estimate the standard deviation of the weekly expenditure.
b. Determine with 99% confidence the number of families that must be sampled to estimate the mean weekly family expenditure on clothes to within $15.

---

Definitions:

Communication Accommodation Theory

Theory that all people adapt their behaviors to others to some extent.

Culture Shock

Feelings of stress and anxiety a person experiences when encountering a culture different from his or her own.

Evolutionary Psychology

is a theoretical approach in psychology that examines human thoughts, feelings, and behaviors through the lens of evolutionary biology, proposing that many aspects of human nature can be understood as adaptations to ancestral environments.

Adapt Reactively

To modify or change behavior after an event.