Question: Critical Thinking Lorraine computed a confi dence interval for m based on a sample of size 41. Since she did not know s, she used

Critical Thinking Lorraine computed a confi dence interval for m based on a sample of size 41.

Since she did not know s, she used s in her calculations.

Lorraine used the normal distribution for the confi dence interval instead of a Student’s t distribution. Was her interval longer or shorter than one obtained by using an appropriate Student’s t distribution? Explain.

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