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 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.

The heights (in cm) of 90 plants in a garden are given below : {:("Height (in cm)",58,60,62,64,66,74),("Number of plants",20,25,15,8,12,10):} Find the mean height.

Find the 20^(th) percentile of the following data : {:("Height (in cm)",135,140,145,150,155,160,165,170),("No. of students",7,20,32,48,36,28,24,4):}

Find the mean height of 65 boys from the following data : {:("Height (in cm)",142,144,146,148,150,152),("Number of boys",10,13,12,7,17,6):}

The following is the distribution of height of students of a certain class in a certain city: {: ("Height (in cms)", 160-162 163-165 166-168 169-171 172-174), ("No. of students", 15 118 142 127 18):} Find the median height.

The following is the distribution of height of students of a certain class in a certain city: Height (in cms): 160-162 163-165 166-168 169-171 172-174 No. of students: 15 118 142 127 18. Find the average height of maximum number of students.

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 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 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.