Correlation — Economics STD 11 Commerce — Question

A good questionnaire should have:

Sample study is useful:

Which measure is based on only the central fifty percent of the observations?

Percentage Bar diagram is:

The correlation between sale of woolen garments and day temperature is:

Data from secondary source are:

Which of the following statement is not true?

When population under investigation is infinite, we should use:

Assertion (A): When the law of demand fails, the inverse relationship between price and quantity does not hold good.
Reason (R): The demand curve may slope upward showing higher purchases at a higher price.