In a Recent Survey of High School Students,it Was Found

question 8

Essay

In a recent survey of high school students,it was found that the average amount of money spent on entertainment each week was normally distributed with a mean of $52.30.Suppose you are told that there is an 80% probability that a randomly-selected student spends somewhere between $49.74 and $54.86.What is the standard deviation of the amount of money spent by high school students monthly?

---

Definitions:

Mortality

The state of being subject to death; often used in statistics to refer to the rate of death in a population.

Income

Money received, especially on a regular basis, for work or through investments.

Individual Behaviours

Actions or reactions of an individual, guided by personal reasons, motivations, or psychological processes.

Education

is the process of facilitating learning, or the acquisition of knowledge, skills, values, and habits through various forms of teaching, training, or research.