A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 35 current students discovering that 13 will return for summer school. At 90% confidence, compute the margin of error for the estimation of this proportion.

Grace is a 70-year old woman who paid the utility bill online for the first time. she called her bank's customer service center to make sure she had done the transaction successfully. but the voice recording repeatedly played a message that all representatives were busy, which irked grace. which factor would make grace not recommend the bank to others? a. absence of technology b. lack of accessibility c. lack of financial products d. poor reputation