Over the Entire Six Years That Students Attend an Ohio

question 24

Multiple Choice

Over the entire six years that students attend an Ohio elementary school, they are absent, on average, 28 days due to influenza. Assume that the standard deviation over this time period is σ = 9 days. Upon graduation from elementary school, a random sample of 36 students is taken and asked how many days of school they missed due to influenza. The probability that the sample mean is less than 30 school days is ________.

• A) 0.0918
• B) 0.4129
• C) 0.5871
• D) 0.9088

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Definitions:

Covalent Bond

A strong chemical bond where two atoms share a pair of electrons to achieve a fuller outer shell of electrons.

Hydrogen Bond

A weak chemical bond between an electronegative atom, like oxygen or nitrogen, and a hydrogen atom bound to another electronegative atom, contributing to the structure and properties of molecules.

Atoms

The basic unit of a chemical element, consisting of a nucleus of protons and neutrons, with electrons orbiting around them.

Triple Bonds

Strong chemical bonds where three pairs of electrons are shared between two atoms, commonly seen in molecules like nitrogen gas (N₂).