Sherrie has spent the last 5 years working for an appliance repair company, and would like to use the skills that she's acquired to venture out and open her shop. As part of her small business grant proposal, Sherrie would like to estimate the average house call repair bill in her area and wants the estimate to be within $20 of the actual figure. To the best of Sherrie's memory from her time with her previous employer she believes the lowest repair bill given to a customer was roughly $50, whereas the largest was approximately $500. How large a sample should Sherrie take if she wants to be 95% confident of the results?

BLANK #1: Is this a question involving mean or proportion? 

BLANK #2: What is the minimum sample size required?

Answer rating: 100% (QA)

Blank 1 This question involves the mean as Sherrie wants to estimate the average hous... View the full answer