Two Hundred Students Are Enrolled in an Economics Class

question 95

Essay

Two hundred students are enrolled in an Economics class. After the first examination, a random sample of 6 papers was selected. The grades were 65, 75, 89, 71, 70 and 80.
a.Determine the standard error of the mean.
b.What assumption must be made before we can determine an interval for the mean grade of all the students in the class? Explain why.
c.Assume the assumption of Part b is met. Provide a 95% confidence interval for the mean grade of all the students in the class.

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Definitions:

Zygote

The initial cell formed when a sperm cell fertilizes an egg cell, marking the beginning of human development.

Spermarche

A primary sex characteristic in males; a male’s first production of mature sperm, which signals the ability to reproduce sexually.

Andropause

Andropause describes the gradual decline in testosterone levels and its associated effects on men, often compared to menopause in women.

Androgens

Male sex hormones, such as testosterone, that are present in both males and females but usually at higher levels in males, affecting physical development and sexual features.