Understand and use the concept that there are variations in confidence intervals between samples and that most but not all confidence intervals contain μ.

u4-t5-s2-d5

Interactive

Do confidence intervals cover μ?

manipulative

Draw many sample CIs and watch the long-run hit rate settle near the confidence level — most cover μ, not all.

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Want a different take?

Already have one and want another angle on this point? Describe what students should notice. Requests are read and acted on.