Standard Deviation

Calculate standard deviation for the data

$\begin{array}{ccccccc}C.I& 15-20& 20-25& 25-30& 30-35& 35-40& 40-45\\ Freq& 5& 8& 7& 2& 4& 1\end{array}$

If the variance of any data ${\frac{3}{5}}^{th}$ then standard deviation will be

Find the standard deviation of the following data.

$\begin{array}{cccccc}Class interval& 0-10& 10-20& 20-30& 30-40& 40-50\\ Frequency& 5& 4& 8& 3& 2\end{array}$

What will be the standard deviation of the data:-

$5,8,15,19,10$

Determine the standard deviation for the data as $5,9,12,7,4$

If each value in a given data is substacted by $9.5$ in them will be the new standard deviation if the standard deviation is $4.5$

Which one of the following statements is wrong regarding symbolic representation for standard deviation?

Which one of the following statements is correct regarding symbolic representation for standard deviation?

Match the list $\mathrm{I}$ and list $\mathrm{II}$ (symbol of the respective Mathematical term) and select the correct answer using the code:

The symbol $\sigma$ is used to represent _____ in measures of central tendency and dispersion.

Find the sample standard deviation for the given ungrouped frequency distribution.

The below table shows the time spent (in $\mathrm{hours}$) by $20$ palyers in tennis practice:

In a given data, each value of dats is multiplied to $2.5$ and the standard deviation of data given is $5.$ then what will be the new standard deviation.

Find the sample standard deviation for the given ungrouped frequency distribution.

The below table shows the working hours in the Biology laboratory of $40$ students:

What will be the effect on standard deviation of data, if each value of data is divided by $1.5$ and has standard deviation as $9$

Find the sample standard deviation for the given ungrouped frequency distribution.

Find the population standard deviation for Discrete Frequency Distribution.

The below table shows the time spent by total $60$ students in their project work:

If the varience of any data is $58.5$ then what will be the standard deviation of that data?

Find the population standard deviation for discrete frequency distribution:

The below table shows sleeping (in $\mathrm{hours}$) of $55$ persons:

Find the population deviation for :

$$\begin{gathered} x=6,8,9,17 \\ n=4 \\ \overline{x}=10 \end{gathered}$$

Note: $x$ is total data.

Find the population deviation for marks of the students in maths  $8,9,13,14,6$ ______.