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Several Interactive Lessons have had issues. Several would not allow you to move forward when performing a function. One would not allow you to perform the function. I had one today where I got all the questions correct and it marked it as RETRY. Retried it twice. Scored perfect twice. Still marked as RETRY. This one specifically was Time Series Forecasting\Preparing Time Series Data.
I am at 89% of the interactive lessons completed and would really like to move forward.
NOTE: The RETRY in Predictive Modeling\Creating a Predictive Model is accurate. I need to retake this course.
The affected lessons in the Time Series course have been updated and should reflect your quiz results accurately going forward. To mark the course as passed you will need to take the lesson and pass the quiz (use the menu to skip ahead).
Note: You may want to attempt the quiz in a different browser (or after clearing your browser's cache) to make sure it grabs the updated version of the lesson.