A Sample of 20 Cans of Tomato Juice Showed a Standard

question 49

Multiple Choice

A sample of 20 cans of tomato juice showed a standard deviation of 0.4 ounce. A 95% confidence interval estimate of the variance for the population is _____.

• A) .2313 to .8533
• B) .2224 to .7924
• C) .0889 to .3169
• D) .0925 to .3413

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Definitions:

Implements

A keyword in Java used by classes to specify that they will provide implementations for the methods defined in an interface.

Interface

In programming, an interface is a reference type that defines a set of abstract methods that a class must implement.

Concrete Class

A class that has an implementation for all of its methods, as opposed to abstract classes which can contain unimplemented methods.

Abstract Class

A class that cannot be instantiated and is designed to be subclassed, often containing one or more abstract methods which must be implemented by subclasses.