Which scale of measure has a natural and valid zero? _________________ The level

Question

Which scale of measure has a natural and valid zero? _________________

The level of measure in which numerals are used solely for the purpose of classification to

allow counting observations is called: ______________________________

Please determine if the following are continuous or discrete. The number votes that can be

cast in a district in a particular election. ________________________

Please determine if the following are continuous or discrete. The number of political ads

that can run on air during elections. ________________________

Is the range or the interquartile range a more reliable statistic? _____________________

A test is said to be reliable if it yields what? ______________________________________

A measure is said to be valid to the extent that is does what?________________________

Explanation / Answer

Ratio scale has a natural and valid zero. Weight, Duration, Length etc are examples and zero is a valid observation.

Nominal Scale. You can have a numeral each for Gender (say Male =1, Female = 0) and count the total for each in a given sample/population.

No of votes is a positive number ranging from 0 to population of district. Hence, discrete.

Number of ads that cab run is also discrete.

Interquartile range is more reliable since it accounts for outliers. A range can be big and misleading if smallest value is very small and the largest is large.

Test is reliable if it yields consistent results.

what it is designed to measure and accurately performs the functions it is purported to perform.

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