The heights (in cm) of 30 students of class VIII are given below: 155,158,154,158,160,148,149,150,153,159,161,148,157, 153,157,162,159,151,154,156,152,156,160,152,147,155,163,155, 157,153 Prepare a frequency distribution table with 160-164 as one of the class intervals.

The heights (in cm) of 35 students of a class are given below : {:("Height (in cm)",157,152,153,154,155,156),("Number of students",7,4,3,5,9,7):} Find the median height.

The heights, to the nearest cm, of 30 men are given below: {:(159, 170, 174, 173, 175, 160, 161, 164, 163, 165), (164, 171, 162, 170, 177, 185, 181, 180, 175, 165), (186, 174, 168, 168, 176, 176, 165, 175, 167, 180):} Using class intervals 155 - 160, 160 - 165, ... draw up a grouped frequency distribution and use this to estimate the Arithmetic mean and standard deviation.

The heights of 50 students, measured to the nearest centimetres, have been found to be as follows: 161 150 154 165 168 161 154 162 150 151162 164 171 165 158 154 156 172 160 170153 159 161 170 162 165 166 168 165 164154 152 153 156 158 162 160 161 173 166161 159 162 167 168 159 158 153 154 159 (i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 - 165, 165 - 170, etc.(ii) What can you conclude about their heights from the table?

The following table shows the heights of 50 students of a class : {:("Height (in cm)",152,148,150,153,149,151,147),("Number of students",8,3,4,7,12,10,6):} Find the mean and the median. Using empirical formula, calculate its mode.

Given below is the frequency distribution of the heights of 50 students of a class: Class Interval:, 140-145, 145-150, 150-155, 155-160, 160-165 Frequency:, 8, 12, 18, 10, 5 Draw a histogram representing the above data.

The following data give the distribution of heights of students : {:(underset(("in cm"))"Height",160,150,152,161,156,154,155),(underset("students")"Numbers of ",12,8,4,4,3,3,7):} The median of the distribution is

The following data gives the distribution of height of students : {:(underset(("in cm"))"Height",160,150,152,161,156,154,155),(underset("students")"Numbers of ",12,8,4,4,3,3,7):} The median of the distribution is

The distribution of heights (in cm) of 96 children is given below. Construct a histogram and a frequency polygon on the same axes. Height (in cm):, 124-128, 128-132, 132-136, 136-140, 140-144, 144-148, 148-152, 152-156, 156-160, 160-164 No. of Children, 5, 8, 17, 24, 16, 12, 6, 4, 3, 1

The following bar graph (Figure) represents the heights (in cm) of 50 students of Class XI of a particular school. Study the graph and answer the following questions: What percentage of the total number of students have their heights more than 149 cm? How many students in the class are in the range of maximum height of the class? The school wants to provide a particular type of tonic to each student below the height of 150cm to improve his height. If the cost of the tonic for each student comes out to be Rs. 55, how much amount of money is required? How many students are in the range of shortest height of the class? State whether true or false: There are 9 students in the class whose heights are in the range of 155-159 cm. Maximum height (in cm) of a student in the class is 17. There are 29 students in the class whose heights are in the range of 145-154 cm. Minimum height (in cm) of a student is the class is in the range of 140-144cms. The number of students in the class having their heights less than 150cm is 12. There are 14 students each of whom has height more than 154 cm.

Construct a frequency distribution table for the following data, taking class-intervals 4-6, 6-8 , ............. 14-16 . 11.5, 6.3, 7.8, 9.2, 10.5, 4.5, 6, 8.3, 12.5, 15.8, 7.4, 5.3, 8.4, 15.2, 8.9, 9.8, 8.25, 6.5, 5.8, 10.5, 14.2, 15.3, 11.7, 9.9, 8.8, 6.6, 4.3, 4.7, 9.4, 10.1, 15.5, 14.4, 12.2, 7.7, 5.5 .