6. Five mark example problems - I

1. The number of televisions sold in each day of a week are \(13\), \(8\), \(4\), \(9\), \(7\), \(12\), \(10\). Find its standard deviation.

 

Answer:

 

Standard deviation \(=\)

 

2. The amount of rainfall in a particular season for \(6\) days are given as \(17.8 \ cm\), \(19.2 \ cm\), \(16.3 \ cm\), \(12.5 \ cm\), \(12.8 \ cm\) and \(11.4 \ cm\). Find its standard deviation.

 

Answer:

 

Standard deviation \(=\)

 

3. The marks scored by \(10\) students in a class test are \(25\), \(29\), \(30\), \(33\), \(35\), \(37\), \(38\), \(40\), \(44\), \(48\). Find the standard deviation.

 

Answer:

 

Standard deviation \(=\)