**Looking at data sets :**

The ultimate of aim of looking at a data set is to understand what it tells us.

1) Look at the data given in the table and answer the questions.

(i) In which year, is the production of rice maximum ?

(ii) What is the ratio between the production of wheat and rice in the year 2007 ?

(iii) How many metric tonnes of wheat was produced in the year 2005 ?

(iv) What is the difference between product of rice and wheat in the year 2008 ?

(v) What was the increase in production of rice from 2007 to 2008 in metric tonnes ?

**Answers : **

(i) 2008

(ii) 9 : 16

(iii) 12

(iv) 17

(v) 4

2) Look at the data given in the histogram and answer the questions.

(i) How many students have scored marks from 0 to 10 ?

(ii) Find the interval of marks have been scored by maximum number of students.

(iii) How many students have scored marks from 70 to 90 ?

(iv) What is the difference between the number of students in scoring marks from 60 to 70 and 90 to 100 ?

(v) Find the total number of students in the mark interval 40 to 60.

**Answers : **

(i) 4

(ii) 40 to 50

(iii) 8

(iv) 3

(v) 30

3) Look at the data given in the histogram and answer the questions.

(i) How many trees do have the height from 15.5 to 20.5 meters ?

(ii) Find the interval of height where the maximum number of trees are there.

(iii) How many trees do have the height from 35.5 to 40.5 meters ?

(iv) What is the difference between the number of trees in the height 20.5 to 25.5 and 45.5 to 50.5 ?

(v) Find the total number of trees in the height interval 45.5 to 55.5 meters.

**Answers : **

(i) 10

(ii) 40.5 to 45.5

(iii) 45

(iv) 20

(v) 55

4) 400 students were asked about their favorite sport and information received from them is given as pie chart. Use the information given below and answer the questions.

(i) How many students prefer swimming ?

(ii) What percentage of students like foot ball ?

(iii) What is the difference between the students who like foot ball and swimming ?

(iv) How many students would like to play volley ball ?

(v) Which sport do most of the students like ?

**Answers : **

(i) 120

(ii) 25%

(iii) 20

(iv) 60

(v) Swimming

After having gone through the stuff given above, we hope that the students would have understood "Looking at data sets".

Apart from the stuff given above, if you want to know more about "Looking at data sets",please click here

Apart from the stuff given on this web page, if you need any other stuff in math, please use our google custom search here.

HTML Comment Box is loading comments...

**WORD PROBLEMS**

**HCF and LCM word problems**

**Word problems on simple equations **

**Word problems on linear equations **

**Word problems on quadratic equations**

**Area and perimeter word problems**

**Word problems on direct variation and inverse variation **

**Word problems on comparing rates**

**Converting customary units word problems **

**Converting metric units word problems**

**Word problems on simple interest**

**Word problems on compound interest**

**Word problems on types of angles **

**Complementary and supplementary angles word problems**

**Markup and markdown word problems **

**Word problems on mixed fractrions**

**One step equation word problems**

**Linear inequalities word problems**

**Ratio and proportion word problems**

**Word problems on sets and venn diagrams**

**Pythagorean theorem word problems**

**Percent of a number word problems**

**Word problems on constant speed**

**Word problems on average speed **

**Word problems on sum of the angles of a triangle is 180 degree**

**OTHER TOPICS **

**Time, speed and distance shortcuts**

**Ratio and proportion shortcuts**

**Domain and range of rational functions**

**Domain and range of rational functions with holes**

**Graphing rational functions with holes**

**Converting repeating decimals in to fractions**

**Decimal representation of rational numbers**

**Finding square root using long division**

**L.C.M method to solve time and work problems**

**Translating the word problems in to algebraic expressions**

**Remainder when 2 power 256 is divided by 17**

**Remainder when 17 power 23 is divided by 16**

**Sum of all three digit numbers divisible by 6**

**Sum of all three digit numbers divisible by 7**

**Sum of all three digit numbers divisible by 8**

**Sum of all three digit numbers formed using 1, 3, 4**

**Sum of all three four digit numbers formed with non zero digits**