Following is the height of 10 students:
`{:("Students",A,B,C,D,E,F,G,H,I,J),("Height(cm)",155,153,168,160,162,166,164,180,157,165):}`
Calculate arithmetic mean using Direct and Short-cut Methods.

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.

Following are the marks of 37 students: {:("Marks",4,6,8,10,12,14),("No. of Students",5,7,6,8,6,5):} Calculate mean marks, using Short-cut Method.

The marks of seven students in intelligence and arithmetic tests are as follows : {:("Candidate",A,B,C,D,E,F,G),("Intelligence test", 30,52,60,62,45,32,41),("Arithmetic test", 41,62,70,78,53,45,57):} Calculate Karl Person's coefficient of correlation and interpret it .

The following table gives the daily income of ten workers in a factory. Find the arithmetic mean. {:("Workers",A,B,C,D,E,F,G,H,I,J),("Daily Income(in Rs.)",120,150,180,200,250,300,220,350,370,260):}

Given below is the data showing heights of 50 students in a class. Find its median. {:("Height(in cm)",162,164,166,167,168,170,173,175,177,180),("Number of Students",6,4,5,12,8,3,7,2,2,1):}

Following is the pocket allowance of 10 students. Find out arithmetic mean using Short-cut Method. {:("Pocket Allowance(Rs.)",15,20,30,22,25,18,40,50,55,65):}

Observe the given data of the height of 15 studetns (in cm 146, 139, 135, 136, 149, 166, 164, 152, 163, 141, 171, 155, 144, 159, 146 Match the lists : {:(" List - I ", " List - II" ),(" (i) Range of the data is "," (p) 151 . 0 6 cm "),(" (ii) Mean height of the students is "," (q) 146 cm "),(" (iii) Median of the data is "," (r) 36 cm "),(" (iv) Mode of the data is "," (s) 149 cm "):}