Find the mode value, mean, variance, standard deviation, median value

Question

Classes   Frequency

35-45         3

45-55        1

55-65        4       

65-75         6

75-85         2

Find the mode value

Find the mean

Find the variance

Find the standard deviation

Find the median value

Find the coefficient value

Answer 1

Here is the problem with your question:

You cannot have classes that overlap!  For example, how often did we get the result "45"?  Well, 45v appears both in the first class as well as the second class.  So did 45 happen with frequency 3, or with frequency 1?