NCERT Class 11-Math's: Exemplar Chapter –15 Statistics Part 2

Get top class preparation for IMO right from your home: fully solved questions with step-by-step explanation- practice your way to success.

Download PDF of This Page (Size: 142K) ↧

Question 2:

Find the variance and standard deviation for the following data:

Answer:

Standard deviation

Question 3:

Show that the two formulae for the standard deviation of ungrouped data.

Are equivalent.

Answer:

We have

Dividing both sides by n and taking their square root, we get .

Question 4:

Calculate variance of the following data:

Answer:

Long Answer Type

Question 5:

Calculate mean, variation and standard deviation of the following frequency distribution:

Answer:

Let A, the assumed mean, be . Here

Variance