Mathematics
Find the mean of :
(i) 5, 15, 20, 8 and 12.
(ii) 28, 24, 37, 42, 56, 59, 67, 28, 15 and 32.
Related Questions
State, which of the following variables are continuous and which are discrete :
(i) marks scored in a test.
(i1) daily temperature of a city.
(iii) sizes of shoes.
(iv) distance covered by a train.
(v) time.
The table, given below, shows the frequency distribution of the weekly wages of the employees of a company :
Weekly Wages (in ₹) Number of employees 800 - 899 22 900 - 999 27 1000 - 1099 23 1100 - 1199 18 1200 - 1299 15 Find :
(i) the lower limit of the fourth class.
(ii) the upper limit of the fifth class.
(iii) the class boundaries of the second class.
(iv) the class mark of the first class.
(v) the class size of the third class.
(vi) cumulative frequency of the fourth class.
(a) Find the mean of the following data :
18, 33, 30, 21 and 13.
Also, find the sum of deviations of this data from the mean.
(b) If 150 is the mean of 200 observations and 100 is the mean of some 300 other observations, find the mean of the combination.
The mean of a certain number of observations is 35. What is the new value of the mean if each observation is :
(i) increased by 7.
(ii) decreased by 5.
(iii) multiplied by 2.
(iv) divided by 5.
(v) increased by 20%.
(vi) decreased by 30%.