following scenarios: the seven point scale. You have no information regarding variability, so you must estimate the standard deviation. points on the scale. A previous study revealed the variability.

c$.$ If your last name begins with $N-Z,$ the stanctard deviation you should use is $1\mathrm{.}32$ confidence level? As an indication of variability, you have a pre$-$test that shows the variability is likely to be $38\%$ yes. this question and the question before it$,$ the sample size estimation changed $-$ what factor was the biggest that effected this change?

e$)$ Assume all of these questions in this handout are on the same survey. What sample size do you recommend? Please include all work and equations. Thank you.