Complete the mean and standard deviation of the following observations of marks of 5 students of a tutorial group: Marks out of
Explanation for the correct option:
Step 1: Find the mean of the following observations:
Divide the sum of all observations by the total number of observations to get the mean:
Step 2: Find the value of the sum of the square of the difference of mean deducted from each term:
Subtract the mean from each term and square each term and get the sum of the obtained values.
Step 3: Find the standard deviation:
Use the mean and the square difference of observation and mean to get the deviation.
Hence, option (A) is correct.