There are 60 students in a class. The following is the frequency distribution of the marks obtained by the students in a test MarksFrequency0x−21x2x23(x+1)242x5x+1 Where x is positive integer. Then the variance of the marks is
There are 60 students in a class. The following is the frequerwy distribution of the marks obtained by the students in a test
Marks012345Frequencyx−2xx2(x+1)22xx+1
where, x is a positive integer. Determine the mean and standard deviation of the marks.
The following table shows the marks obtained by 6 students in a class. Find the average marks of the students in the class.
MarksFrequency782651852741
In the given frequency distribution where the marks are ordered, which 2 observations (students) are the median observations?
Marks obtainedNumber of students(Frequency)2062520282429283315384422431