Solve the Problem. -Scores on a Test Are Normally Distributed with a Mean

question 185

Multiple Choice

Solve the problem.
-Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Estimate the probability that among 75 randomly selected students, at least 20 of them score greater than 78.

• A) 0.0113
• B) 0.0239
• C) 0.1736
• D) 0.0166

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Definitions:

Electrical System

The network of electrical components and wiring in a vehicle or machinery that generates, stores, and distributes electricity for various functions.

Diode Bridge

A circuit component consisting of four diodes arranged in a square so that when AC power is applied, it is converted to DC power.

AC Leakage Specification

A specification that defines the maximum allowable leakage current in alternating current (AC) circuits, critical for ensuring safety and preventing equipment damage.

Charging System

Consists of batteries, alternator, voltage regulator, associated wiring, and the electrical loads of the vehicle. The charging system provides the current requirements of the vehicle in operation and recharges the batteries when necessary.