What is difference between a qualitative and a quantitative variable?

Date: 2015-10-07; view: 513.

Five ice cream flavors are rank – ordered by preference. What is the scale of measurement?

Measurements – some quantitative and others qualitative. The measurements are the actual numerical values of a variable.

There are 4 generally used scales of measurement, listed here from weakest to strongest.

Nominal Scale

Ordinal Scale

Interval Scale

Ratio Scale

According to sentence it is an Ordinal Scale. In the ordinal scale of measurement, data elements can be ordered according to their relative size or quality. 5 product ranked by a consumer may be ranked as 1,2,3,4, and 5, where 5 is the best and 1 is the worst. In this scale of measurement we do not know how much better one product is than others, only that it is better.

Statistics is a science – the science of information. Information may be qualitative or quantitative. To illustrate the difference between these two types of information, let consider an example (Table 1-1

A quantitative variable is a variable that can be measured by a number, usually on a ratio scale, but at least on an interval or ordinal scale, such that less and more can be measured and determined.

EXAMPLE:CARS IN A CAR PARK
A qualitative variable is also called a categorical variable. The items are different, but the difference is not a measure, such as square and round, hungry and fed. Statistically, these variables may be known as binomial or amenable to chi-square analysis.
EXAMPLE:RED CARS IN A CAR PARK

1-7. A town has 15 neighborhoods. If you interviewed everyone living in one particular neighborhood, would you be interviewing a population or a sample from the town? Would this be a random sample? If you had a list of everyone living in the town, called a frame, and you randomly selected 100 people from all the neighborhoods, would this be a random sample?

For the first question the answer is non – random sample,

Frame is random sample, for the second question.