Lab Notes and Clarification on question 1b of Lab 3

Hello everyone,

Annotated Notes for Lab 2 and Lab 3 were posted. However, I need to clarify a point in question 1b of Lab 3. My explanation for 1b in Lab tonight was not accurate. I misread the question.

Question 1b: You decide that this interval is too wide, and would like to have one that is only half as wide. How large a sample size would you need? Show how you got this result.

Suggestion: You will need to cut the interval obtained from (a) in half first before finding the new half-width. So the new sample size should be larger than the original sample. The new n should not be 100 as the original n.