Hello there

It's very good that you want to improve your analytical skills as these not only help in any examination but also in our life to make decisions,plan and organise various broader things.

Before improving your analytical skills you just have to make sure that you will practice them regularly because that's the only way to sharp it.

Here are the things which you can do to improve it:

• Always try to do dynamic things by making it into your habit and try to implement your analytical skills on to that habit.
• Try to do puzzles and brainteasers.
• Do some courses on Statistics which will add new skills into you.
• Read read some books own which are based on analytical skills and some games which includes mathematics.
• Try to analyse various data which are available in your day to day life and from various other sources.

I hope it helps you!

Good luck!