In this lesson, students use the information gap format to ask questions to acquire information to analyze data from an experiment. In the optional activity, students use a table of values to find the area under a normal curve above an interval based on the zscore of the values. The activity is optional since it is only necessary if technology is unavailable to find these areas.
Students must reason abstractly and quantitatively (MP2) when they understand the statistics in context. Students also attend to precision (MP6) by considering the questions they need to ask in order to get information to analyze the experimental data. Students use a normal distribution to model data from randomized regroupings of data from an experiment (MP4) to determine whether there is evidence that the treatment is the cause of any difference in means obtained from the experiment.
Lesson overview
 15.1 Warmup: Is It the Treatment? (10 minutes)
 15.2 Activity: Info Gap: Is There a Difference? (25 minutes)

15.3 Optional Activity: Using Tables for Normal Distribution Areas (10 minutes)
 Includes "Are you Ready for More?" extension problem
 Lesson Synthesis
 15.4 Cooldown: What Do You Need to Know? (5 minutes)
Learning goals:
 Ask questions (orally) to determine information needed to analyze data from an experiment.
 Identify the area under a normal curve above an interval based on zscores and a table of values.
Learning goals (student facing):

Let's ask the right questions to analyze data from an experiment.
Learning targets (student facing):
 I can use a randomization distribution to determine whether or not a treatment was the cause of the results of an experiment, or if the results are due to the random assignment of the groups.
 I understand why it is important to question the results of an experiment.
Required materials:
 Preprinted slips, cut from copies of the blackline master
Required preparation:
 The optional activity requires students to use a table of areas under the standard normal curve using zscores.
 Find a table like this online and make copies for the class.
 Searching for "z score table" should provide several options.
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