There are 60 students in a class. The following is the frequerwy distr

1.	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.
Answer» There are 60 students in a class. The following is the frequerwy distribution of the marks obtained by the students in a test $\begin{matrix} Marks & 0 & 1 & 2 & 3 & 4 & 5 Frequency & x - 2 & x & x^{2} & (x + 1)^{2} & 2 x & x + 1 \end{matrix}$ where, x is a positive integer. Determine the mean and standard deviation of the marks.

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.

Answer»

There are 60 students in a class. The following is the frequerwy distribution of the marks obtained by the students in a test

$\begin{matrix} Marks & 0 & 1 & 2 & 3 & 4 & 5 Frequency & x - 2 & x & x^{2} & (x + 1)^{2} & 2 x & x + 1 \end{matrix}$

where, x is a positive integer. Determine the mean and standard deviation of the marks.