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# Subscription

This book is free to read online. However, it requires subscription to use the embedded R program in order to cover cost to maintain the Web server. There are different subscription options as shown below. Note that the newly registered user can use the book fully for free for 1 day. Partial refunded will be provided based on the time used if the book is took offline for any reason. Under no condition, a user can be refunded or compensated for more than the subscription fee paid.

 1 Day Free 1 Week $1.49 1 Month$4.99 3 Months $9.99 6 Months$14.99 1 Year \$24.99

To subscribe to the service, choose the length of subscription and click on 'Pay now'. Note that you DO NOT need to have a PayPal account to pay. Make sure to include your Advstats email address if you are paying through a different email.