Introduction to Statistics

Find the range of the given data: $53, 42, 61, 9, 39, 63, 14, 20, 06, 26, 31, 4, 57$

A _____ of information in numbers is called data. (collection/calculation)

The marks of $30$ students in Mathematics (out of $100$ ) are as follows:

$52,60,50,61,76,67,57,100,68,90,74,89,76,38,85,57,59,49,61,55,45,57,53,63,60,72,36,51,59,54$

The following data shows the different colours of umbrella preferred by a group of people.

What is the total number of people in the group?

Ganesh buys vegetables and fruits every day. The following data shows expenditure on the same for a week.

On which day was the expenditure maximum?

The marks of $30$ students in Mathematics (out of $100$ ) are as follows:

$52, 60, 50, 61, 76, 67, 57, 100, 68, 90, 74, 89, 76, 38, 85 ,57, 59, 49, 61 ,55, 45, 57,53, 63, 60,72, 36, 51, 59, 54$

If $40$ is the passing mark, how many students failed?

The above data shows the different colours of umbrella preferred by a group of people. Find the colour which is the most common.

Statistics is the subject that deals with the collection, presentation, analysis and interpretation of numerical data.

Each numerical figure in a given data is called as observation.

The data shows the weight (in $\mathrm{kg}$) of $11$ workers in a factory:

$75,$ $63,$ $66,$ $60,$ $60,$ $66,$ $63,$ $66,$ $72,$ $66,$ $75$.

From the above data, what is the highest observation?

Find the median of the $10$ observations $36, 33, 45, 28, 39, 45, 54, 23, 56, 25$. If another observation $35$ is added to the above data, what would be the new median?

The class marks of a frequency distribution are $15,20,25,30,.......$ The class corresponding to the class mark $25$ is 

The class marks of distribution are $105, 115, 125, 135, 145, 155, 165$. The class size is