Null Can Be Used

question 18

Multiple Choice

null can be used:

• A)to indicate a variable has no real value
• B)in a Boolean expression with ==
• C)as a placeholder
• D)all of the above

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Definitions:

Point Estimate

Represents a single value given as the best guess or most likely value of a population parameter based on sample data.

Sampling Error

The difference between a sample statistic used to estimate a population parameter and the actual but unknown value of the parameter.

Population Parameter

A numerical characteristic of a population, such as mean or standard deviation, that is usually unknown.

Proportion

In statistics, a proportion refers to the fraction of the total that exhibits a certain trait or characteristic.