Question 1: Find the standard deviation for the following distribution:

Answer:

Median value of is 34.5

*Calculation of Variance and Standard Deviation*

Question 2: Table below shows the frequency with which alpha particles were radiated from a diskette.

Calculate the mean and variance.

Answer:

*Calculation of Variance and Standard Deviation*

Question 3: Find the mean, and standard deviation for the following data:

Answer:

(i)

*Computation of mean and standard deviation*

(ii)

*Computation of mean and standard deviation*

Question 4: Find the standard deviation for the following data:

Answer:

(i)

*Calculation of Variance and Standard Deviation*

(ii)

*Calculation of Variance and Standard Deviation*