How many parents would need to be sampled? Can I do this on ti-84 calculator

Question

You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately 43.7 dollars. You would like to be 90% confident that your estimate is within 2 dollar(s) of average spending on the birthday parties. How many parents do you have to sample? 

Find n=

Answer 1

Hi! I have answered the question in this video. If you have any additional questions, please feel free to reach out.

Dr. C