This 27 question fill-in worksheet is related to a unit or lesson on Confidence Intervals and the Common Core State Standard for Math, Making Inferences and Justifying Conclusions HSS-IC.B.4: Use data from a sample survey to estimate a population mean or proportion; develop a margin of error through the use of simulation models for random sampling. The worksheet is a good 'startup' activity to introduce and/or supplement an existing discussion on confidence intervals and estimation. You can use the activity as independent learning or allow students to table share as a quick collaborative startup activity for a unit on confidence intervals. Alternatively, the document can be used as a formative assessment midway through a unit on confidence intervals. This document can be used by one teacher at one school. If you would like to share it with a friend, please direct them to our store or purchase an additional license. If you find an error or want to make a suggestion for improvement, please contact me at my store’s home page: https://www.teacherspayteachers.com/Store/Rosiespage. You may also email me at firstname.lastname@example.org . I’d love to hear your feedback about using this product. Remember, it helps all of us as teachers when you rate this product. You will receive TPT credits that you may use toward purchases on future products. Just click on my store link above or under the “My Purchases” tab. Again, I welcome your feedback and questions.