CDS || Mathematics || Statistics || Quiz

There are 45 workers and 15 officers in a factory. If the mean salary of the 60 employees is 4800 and the mean salary of the workers is 5000, then the mean salary of the officers will be?

The mean of the following distribution is 18.

What is the value of f?

Consider the following statements:

I. A frequency distribution condenses the data and reveals its important features.

II. A frequency distribution is an equivalent representation of original data

Which of the statement(s) given above is/are correct?

Square diagrams are drawn to represent the following data:

Using the scale ₹ 25, what is the length of the representative square for Maharashtra?

The cumulative frequency curve of a frequency distribution with 6 classes and total frequency 60 is a straight line. Consider the following statements.

i. The first and the last classes have a frequency of 10 each

ii. Both the middle classes have a total frequency of 30

iii. The frequency distribution does not have a mode

Which of the statements given above are correct?