Distinguish between interval and ratio variables.

You have a question followed by two statements. Which of the following statement(s) is/ are required/sufficient to answer the question ?

Question : What is the total weight of 20 boxes of vegetables ? Each of them is of equal weight.

I. Of 10 boxes, one third of each box weighs 10kg. 

II. Total weight of 6 boxes is 60kg more than that of 4 boxes.

Read the question below and decide which statement/s is/ are sufficient to answer the question.

Question:

Mridual has four almirahs and 24 books. She wants to organize her books. How many books can be kept in one almirah?

Statement:

1. In shelf one twice the number of books can be kept in comparison to shelf two.

2. 12 books can be kept in shelf four.

3. Only 6 books can be kept in shelf three.

If the class marks of a distribution are $28, 34, 40, 46, 52$; then the class intervals are of length _____.

The midpoint of the class interval is called _____ . 

In a grouped frequency distribution, the difference between lower limit and upper limit of a class is called _____. [class interval/ class size/ class mark/ class limits]

The class mark of the class interval $9.5-16.5$ is _____.

Data means information in the form of _____figures.

The mid-point of a class _____ is called its Class Mark.

The following bar graph shows the number of hours of sunshine on each of the days of a week.

The sunshine was for the minimum number of hours on _____.

If the class marks in a frequency distribution are $19.5, 26.5, 33.5, 40.5, 47.5, 54.5, 61.5$; then the class size of the distribution is _____.

If the class-marks of a distribution are $32, 39, 46, 53$; then the width of each class interval is _____.