Question 2 :
The class mark of the class interval 20 - 29 is

Question 4 :
If $1 - 5, 6 - 10, 11 - 15, 16 - 20, ...$  are the classes of a frequency distribution then the lower boundary of the class $11 - 15$ is _____

Question 5 :
Following are the marks obtained by 30 students in an examination :<table class="wysiwyg-table"><tbody><tr><td>15<br/>16<br/>44<br/>27<br/>&#160; 7<br/>37<br/></td><td>20<br/>17<br/>47<br/>25<br/>11<br/>47<br/></td><td>8<br/>20<br/>38<br/>28<br/>21<br/>23<br/></td><td>9<br/>24<br/>36<br/>30<br/>31<br/>20<br/></td><td>10<br/>30<br/>40<br/>19<br/>41<br/>17<br/></td></tr></tbody></table> Taking class intervals 0-10, 10-20, ..................., 40-50, construct a frequency table.<br/>

Question 6 :
Prepare a continuous grouped frequency distribution from the following data:<br><br><table class="wysiwyg-table"><tbody><tr><td>Mid Point<br></td><td>Frequency<br></td></tr><tr><td>$5$<br></td><td>$4$<br></td></tr><tr><td>$15$<br></td><td>$8$<br></td></tr><tr><td>$25$<br></td><td>$13$<br></td></tr><tr><td>$35$<br></td><td>$12$<br></td></tr><tr><td>$45$<br></td><td>$6$<br></td></tr></tbody></table>Also find the size of class intervals.<br>

Question 7 :
The lower limit and upper limit of an exclusive class&#160;interval are $15$ and $25$ respectively. Then the class&#160;mark is _____

Question 8 :
Ramya wanted to group the students in her class on the basis of height. For this, she asked every student their height in inches.<br>What kind of data did she collect?