A University Has 5,000 Students

question 24

Essay

A university has 5,000 students. The manager of food services at the university is interested in determining the total lunch expenditure. A simple random sample of 121 lunch receipts was selected. The sample showed an average of $3 with a standard deviation of $0.40.
a.Estimate the standard error of the sample mean.
b.Develop an approximate 95% confidence interval for the population mean.
c.Estimate the population's total expenditure for lunch.
d.Develop an approximate 95% confidence interval for the total expenditure for lunch.

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Definitions:

Red Petals

Colored sections of a flower's corolla, often used to attract pollinators.

Statistical Significance

A measure of the likelihood that an observed difference or relationship exists due to chance.

Utricle

A part of the inner ear involved in sensing linear accelerations and head-tilt positions relative to gravity.

Saccule

A small, bed-like structure in the vestibular system of the inner ear, contributing to the sense of balance.