For the below problem, I used the central limit theorem (z value) to calculate upper/lower limits. Should I use the T-value or z-value? Why?

For the below problem, I used the central limit theorem (z value) to calculate upper/lower limits. Should I use the T-value or z-value? Why?I have .657 as upper limit and .563 as lower limit. Agree?

For the below problem, I used the central limit theorem (z value) to calculate upper/lower limits. Should I use the T­value or z­value? Why?I have .657 as upper limit and .563 as lower limit….